M855 out of 20 inch barrel. 5 inch barrel with both a .

M855 out of 20 inch barrel 5 barrel(1750fps) using the same ammo. 151 G7 BC figure accurately represents the real-world velocity curve of 20-inch Barrel. 5 to 3 inches). The problem is that M855 tended to only fragment and yaw at right angles. Shooting from a ZEV technologies 16” 1/7twist 5. What about SS109 / M855 in a 1/12” 20” barrel? Better rephrase that. I would also like to know the best yardline to zero the weapon. The 77s were averaging The M855 ammunition is optimized for a 20-inch barrel with a 1:7 twist barrel. The zero I’m referring to is a 25 meter zero using m855 62g ammo from a 14. 56 NATO round is better for your AR-15? Learn the key differences in performance, accuracy, and usage. 56 loads due to the two part bullet construction and it's overly stable and likes to just ice pick straight through without any sort of fragmentation or tumbling. So, here is a quick demonstration of the two standard milsurp types out of a "Government profile" chrome lined 20" Colt barrel of not spectacular accuracy. 56 NATO and M855: The 20-inch barrel is particularly well-suited for M855 ammunition, which is a common type of 5. We set up a simple test to find out if the steel core in M855 is truly “armor piercing” versus the The 20 inch barrels are known for being able to stabilize heavier projectiles than usually associated with that one and nine twist rate. I’m aware the reticle is designed for meters and M855 out of a 14. Soviet composite vests from the late 80s could stop M855 out of a 20" barrel at like 20 yards. However, older rifles, such as early AR-15’s with a 20 inch barrel, may have a 1 in 12 twist rate. 5 inch barrel with both a Both the M193 and M855 bullets demonstrate similar terminal performance as described above, when fired from rifles fitted with a 20-inch or longer barrel. Let’s get down to the nitty-gritty numbers of the M855 round. Like I saidI just grabbed cheap ball ammo to go get rough zeroed in on two rifles and that is what the FN barrel in my Mk12ish build turned out using the Monarch 55gr Brass and M855 ballI DO NOT claim that M855 is match gradeI am simply pointing outhow well my FN CHF/CL 18" . 4 MOA. I forget which bullet those figures were for. 25-1. M855 vs M193 for short barrels (10-12 inches) Thread starter AR10ShooterinNC Start date even crappy M855 is in the 2500FPS range out of a 10. I shot from the seated position at a bench. 140-150 meters. Given the quality of journalism on display among the major networks these days, it’s no surprise that the facts of the matter have been muddled and obfuscated to the point So while you can ring steel with an 11-in barrel at 5 or 600 yd. 5-inches produces insufficient muzzle velocity to achieve the terminal performance described above. 6 inches mean radius, which is equivalent to 1. 2960 fps, with a muzzle energy of 1080 ft-lbs. 5" BCM put 10 shots into 4 inches. Testing proved that green tip bullets did not perform well out of shorter barrels. Me personally I like two full rotations in a barrel if I’m expecting any kind of accuracy out of it. I'm hoping 500 yards on steel (on occasion) isn't too tough of proposition. Weight and Length: 62 grain. 5-inch M4 barrel, compared to the 16,067 p. The following distances are about how far you can expect your M855 spec ammunition to Both rounds are capable, but their performance varies depending on range, target type, and the twist rate of your AR-15 barrel. My 1:8 The same thing happens with 2000-3000 fps muzzle velocities, the numbers just get much larger. 5″ long carbine barrels as in [ARCHIVED THREAD] - 14. Winchester M855 (62 gr. Pretty sure it stopped M855A1 as well. 5” or 16”) but the extra velocity also corresponds to greater rotational speed, and possibly greater over-stabilization. A rifle fitted Am I not correct in thinking that the trajectory of an M855 would be vastly different coming out of a 81/2 barrel vs 20 inch? And no 20" data for it. Clocks 2870 fps from my 20 inch Wylde 1-8 barrel. Like someone else said on this post, 50-250 you actually hold low instead of Of the standard barrel lengths 14. So a 18 inch barrel is going to have less velocity loss at 100 yards than a 10 inch. . 5-inch barrel produced two separate wound tracks. S. The forward end of the weapon rested on a rubber shooting block. If your shoot very hot 5. Q5: Is the BROWNELLS BRN 16A4 20″ Upper Receiver suitable for long-range shooting? A5: Yes, the 20-inch barrel with a 1-7 twist and chrome bore and chamber make this upper receiver an excellent choice for long-range shooting. 5″ upper. Anyway, just a heads-up. Lighter weight = higher speed, Heaver weight = higher energy. e. 5” and 16” uppers mounted with cowitness aimpoints to great affect. So an 11. Thinking one could infer from the listing of 20" flat top with M855 being setup for 0. 22 and my 10/22) and I had 6 rounds of USGI LC 11 headstamp M855 to run over the Next up for the Big Freakin’ Cartridge Test is Korean manufacturer PMC’s clone of M855, called X-TAC M855 LAP. . Originally it wasn’t created to defeat body armor but was meant to penetrate thin barriers such as car doors and steel helmets. Army and Marines began to issue out M4 Carbines, which use a 14. Out of a 20" barrel with M193 this is This shows the velocity of XM855 from different barrel lengths. 5 would be just over 2700 FPS and 12. Even out a 20 inch barrel at cqb distances. 5 inches (standard length for the M4 carbine) and 12. 5 inches. 5 just over 2600 FPS. 5" 5. 4" at 500, 5" at 600. M193 in 20" Barrel - 100 yd zero. They said take 25 fps off for each inch of barrel While M855 passed that helmet penetrating requirement, it took away from the overall effectiveness of the round. I have a really good load worked up for one of my ars, with 77gr smk. A. A 20-inch barrel buys you up to 200 yards, a 16-inch barrel buys you up to 150 yards and a 14. 62mm, 20 inch barrel, 168 grain bullet, and M16/AR15 carry handle mount. Reply reply englisi_baladid • M855 isn't 55gr. However, many riflemen never shoot anything but 55 and 62-grain ammunition from their AR-15, and a 1-9 inch twist works just fine for this. 5″ barrel firing M855 and has a reticle that only goes to 600 The CBC 77 grain Sierra Match King is well worth testing. Xtac 62gr M855 green tip, AAC 77gr OTM, and AAC 75gr Sabre black tip. Thank you. Most people have 16 inches or below though. This over-all length gives the A1 Need some help on a solution, 16” barrel with MK18 arca handguard. 75 in Shooting Angle: 0° Wind Speed: 0 mph The biggest difference was the Initial Yaw began at 1. Which is less likely to dimple the steel at that range? Green tip has the steel penetrator, but M193 has higher velocity. If a round did not hit at the correct angle, it would fail to yaw and fragment and instead pass clean through the opponent. M855 and M193 are some of the most popular and widespread rounds in the US today. Looking for some good muzzle velocity figures (15ft or 78ft) for M855 ammo and M193 from AR carbine The M855 bullet was truly designed for a 20″ barrel and it doesn’t get much better performance out of a longer barrel than that. Thanks for the information. If I shoot the same round out of a 16" 1-9 twist barrel and only get an MV of 2200 fps, then the rpm falls to 176,000 rpm - a 16% decrease in spin. For M855 and M193 ballistics, barrel length doesn't matter much. The 20 inch AR also stands out for its aesthetic qualities. 5 out of the 6 rounds registered at 3400 fps or faster, one registered 3399 fps. x is barrel length in inches. Wait, I can turn FMJ into frag round if I use 55 grain out of a 1:7 20 inch barrel? Thats bad ass Reply reply cunninglinguist666 • Im not gonna say no I would highly disagree that barrel length is irrelevant. Beyond any of these ranges, the effectiveness starts to drop. For best accuracy, a heavy / bull barrel is preferred. 3200 fps is close to maximum 5. 56 so deadly. An average difference between a 20” barrel and a 24” barrel is 79 FPS for a difference of approximately 20 FPS per inch of barrel. 223 bullet I know of. 258 inches. Even if M855 fragmented effectively down to 2600 fps according to your dubious claim in your post, M855 fired from your barrel will drop below 2600 fps at a We just chronographed XM193 in a 14. With a 20" barrel what you'd want is the TA31F RCO-A4CP. 56 guns include 14. Everyone just makes 1-7 and or 1-8, which are meant for heavier bullets than almost anyone uses. I’ve never shot any fancy 55 gr loads, though. M855 16" barrel. Two points should jump out of the results in the attached table, which combines the two sets of test results. Polly level 3 stops m193, but fails against m855, and steel level 3 stops m855, but Interesting, I got around 3150 out of a 16” CHF Chrome Lined barrel with Winchester Lake City M193. but the unstabilized M855 out of a 1/12 twist could raise the same complaints Like I said, I was zeroing a 4-16 scope using XM855 at 200 yards and felt like I was chasing a zero. Caption: Out of a 10-inch barreled HK416, the M855 bullet only achieved 2576 fps, and as a result, barely deformed when hitting the gel. 3" barrel which is nothing to sneeze at. This is Peak velocity is achieved with a 20" barrel. 5" M4, or (worse) a 11. i. When the military trimmed the M16 into the M4, they lost velocity. Those humps and dips are anomalies due to that particular barrel. By the book, with 62 grain ammo (M855), point target (man sized, think IPSC) 550 meters (~600 yards) with a 20” barrel, 500 meters with a 14. I used 8″ as the “vital zone” for point blank range to represent the -0 zone of an IDPA target. The M855A1 completely fragmented, retained nothing. 280 AI chambered Eliseo tube gun with a 28 in. M855 These are the approximate ranges where the bullet velocity drops to 2700 ft/sec. 56 NATO the optimal length is around 20", as the M855 cartridge was designed for it, but the speed maxes out around 30". For 6. Here is the chart. There is a guy named Oxide who does Soviet/Russian armor tests on youtube. Reply reply I’ve been geeking out on 20” barrels for a while now. 56mm pressure from a 20" barrel. It needs to be noted that for all 16″ barrel testing, a cooling time of 10 seconds was used instead of 30, as it was becoming obvious that The M855 is optimized for rifles with a 1 in 7-inch twist rate and has a muzzle velocity of approximately 3,100 feet per second. SD. 1 turn per X inches). Slug: Lead. M855 (green tip) produces about 2,920 fps from a 14. 5″ barrel lengths out to 600 yards, a reasonable distance for this cartridge. There is a high chance you will not get fragmentation thru a target Reply reply TheDreadnought75 NATO specifications for M855 Ball require a 61. Story goes that 20" won out, but the procurement system wouldn't let them add the barrel because the original 20" M16 pencil was still in What is the Max effective range of a M855 round out of a 10. 5" barrel could produce higher muzzle velocity(2900fps) than a 14. My short summary of M193 won’t fragment reliably out of an 11. 151 Bullet Weight: 62 gr I want this to be the best ballistic trajectory calculator out there. Drag Function: G7 Ballistic Coefficient: 0. the 20-inch barrel, the A 1 in 12" FN-FNC firing M855 at 100 yards. Barrel length in inches. It’s easier to Shooting 20", 16" and 10. 243 Bullet Weight: 55 gr I want this to be the best ballistic trajectory calculator out there. The 18-20 inch barrel will in most cases give you an extra 50 yards or so in which the M855 will fragment. * 3. Magpul Gen 3 Pmags (only them) solved How do commercially available M855 loads obtained through 20-inch test barrels. 56 in either 55g (m193 or similar) or 77g SMKs. Produces a ballistic trajectory chart and table that shows the drop, velocity, kinetic energy, windage, and For gas port pressure, the M855A1 generates 50 percent higher pressure (23,767 p. 223 Wylde rifle gas barrel shot that day Conversely, there is also just as much difference between a 16" barrel and an 18" barrel (around 100 fps or 50 fps per inch). 55gr fragments down to 2700fps. It With M855 out of the same 20" barrel you are looking at 3060fps and with a weight of 62gr its muzzle energy is ~1289ft/lbs. M855 62 gr 20. 56mm barrel. M855 zeroed at 300 meters; M193 re-zeroed at Does anyone have at hand the ballistic coefficients for Mk 855, Mk 262 and the Mk 318 ammo? How about muzzle velocities from an A2 barrel? I appreciate any help, DC Yeah Robert fackler and gary roberts have researched this to death. We would like to show you a description here but the site won’t allow us. The red line on the chart is the minimum velocity for reliable fragmentation, which is a main wounding mechanism of the load. Out to the distances we care about, the velocity curve given by the 0. About 13 x 18 inch ES at 1000 for ten shots. Posted: 3/29/2010 4:42:06 PM EST [#10] Quoted: M855: Defined in MIL-C-63989 a 61. 56 upper with a chrome moly 20" barrel in 1x7. Out of a twenty inch barrel, which is what it was designed for, it performs pretty well. Accuracy: maximum of a two inch mean radius at 200 yards from ten 10 shot groups (~3 MOA). 14. 5” barrel at any range. You need to remember that the reason for the switch from m193 to m855 was due to the us army moving from a 16" barrel to 14. I have one with a 1:7 barrel 20" long. M193 only defeats steel level 3's regularly and even then only with a 20 inch barrel. Out of a 20" 1:9 you're usually okay. While only one of these loads topped 3,000 fps when fired through my 16-inch gun, a total of four fell within A gun barrel’s twist rate (aka rate of twist or barrel twist) indicates how many inches it takes its rifling to make one complete rotation. I can't decide if I want a 20 in barrel or an 18 inch. That M855 isn't the devil like its been made out to be recently, but its definitely lacking in the terminal effects department. SOCOM guys have been using Mk262 77-grain rounds with Sierra Match King bullets for years, while the Marines have been using Mk318 for combat operations. When it is used this way it is effective in most circumstances. Bottom line up from: What is the best cartridge to shoot a High BC (like 162 ELD-M) 7mm bullet out of a 20 inch barrel at 3000 fps (ish)? Background: I am currently running a . 5″-barreled M4 when shooting M855 ammunition. 5 " and 100 yards out of 16" barrels due to the reduced velocity. So, a 14. 56mm, 20 inch barrel, 55 grain bullet, and M16/AR15 carry handle mount. I'd like to find a retro 20" A1 barrel with a 1:9" twist barrel but all I'm finding is 1:7, 1:12 and 1:14 and not quite motivated yet to make one. Two rounds, first round: 3107, second round: 3102. 5" Barrel Ar-15's with M855 Ball Part 2 Will Feature ChronographsPut in the COmments what Ammo you want to See compare Barrel Introduction of the M855 cartridge (1:12 twist): In the 1980s, the US military introduced the M855 cartridge, which featured a heavier 62-grain bullet with a steel penetrator core. It’ll do it intermittently point blank but the terminal characteristics that were already capable of being fickle from a 20” barrel now are downright unreliable. There has been a cultural shift from the 20-inch barrel In the ballistics table below, we will compare M855 vs M193 ballistics out to 700 yards fired from a 20” barrel. I took the opportunity to take some of my other guns out (besides his Savage single shot . The hardened steel tip chatters feed ramps and the “chamber face” in HK 416’s. The study shows M855 velocities for every inch increment up to 24". It needs to be noted that for all 16″ barrel testing, a cooling time of 10 seconds was used instead of 30, as it was becoming obvious that the The first is with a 20″ barrel firing M193 at 3300 FPS, the second is a 16″ barrel at 3100 FPS, and the third is a 12. 5 or even more dramatic 11. I have to think this 'M855' must be loaded with bullets that failed QC or something. Three variants of M855 at the left, followed by two variants of the new M855A1, followed by a much more rare M995 Tungsten AP round. Fackler puts m193 as failing to yaw ~25% of the time out of a 20 inch barrel. 260 cal it would be . 2880 fps, muzzle energy of 1020 ft-lbs. Well, "magic" is a relative term. 56 ammo for your AR-15 rifle based on M855 vs M193 ballistics. Not only is the 20 inch going to hit Hello all, yes, I'm new here. 304. 5″ barrel at 2900 FPS. However, 5. Posted: 8/5/2020 1:52:57 PM EST For the most part the difference in zero for M193 vs. Sometimes less. The conclusions at the end of the study are also interesting. 7mm/. The only practical difference between them was: 2 inches of barrel. let me spell it out for The 10. different groups alternatively wanted either a 16" or 20" barrel. I can't get as good with a scoped Colt Sporter 1:7 (maybe 2. 5" Commando carbine and you have issues, however. 56mm is still a serious threat out to about 500 meters. M855 was designed to function when 20" rifles were the norm. 5″ resulted in a velocity reduction of 214 ft/sec with the UMC 223 55-grain cartridge, 244 M855 vs M193: Which 5. advantage over the 14. com observed: “Cutting the barrel from 26″ to 16. M193: Known for its lighter 55-grain bullet, the Calculates the ballistic trajectory of a bullet fired from a rifle, handgun or other firearm. Steyr made a small batch of less than 200 16 in barrels with a 1 and 7 twist. If what you want to do is make hits at extended ranges for fun, barrel length isn't that important if you're a good shooter. Muzzle velocity of the M193 out of a 14. The fragmentation range of M193 varies depending on the length of your rifle’s barrel. This procedure was followed for 14. The XTAC was a 15 shot group. I agree with you. This is anticipated since the cartridge was designed specifically for this barrel length. When fired from the 16” barrel with a 1:9” twist, the M855 projectile will have a gyroscopic-stability-factor of approximately 1. We then got into a discussion of the optimum twist for M855, especially given the Swiss chose 1/10 Currently have a 16. 5" . First, let’s look at the ballistics. Really accurate at 900 yards. From a 14. M855 Barrel-Length-Velocity it to be that low. 223/5. Share Add a Comment. This makes it more effective at short to medium ranges, where speed and Green Mountain Rifle Barrel Co. 24 and when fired from the 20” barrel with a 1:7” twist the gyroscopic-stability-factor will be approximately 2. 18. 56 NATO round. 8 to 2. 5”. Next, we’ll use the 20-inch barrel and fire two rounds of M855 A1. - M193 90-95 meters. However, the vast majority are 16-inch, which is the length we will focus on. with the M249 5. The shorter the barrel the better it is to have a heavier bullet. The last photo shows a TA01-NSN, which is designed for a 14. 5" long. The M855A1 was designed to give 20" barrel performance in a 14. Sort by: Best. I shoot it at 1000 yards all the time. Many 5. However, the story changes when using a 20” barrel for example (M-16). There isn't a magic velocity line where it will or won't yaw. There are exceptions, such as civilian versions of the RPK-74 (23. Five of the M855/SS109 loads showed muzzle velocities within ATK’s acceptable range when fired through my 16” gun. First, average muzzle velocity is in no way indicative I've been aware of the difference between the two models and I know that BDCs are a compromise in general, but I understand the M4 reticle's BDC is designed for M855 out of a 14. Typical velocity 15 feet from the M16A2's muzzle is 3,100 fps. Can it penetrate armor that the M193 or M855? Will be mostly fired from 16 inch barrels and will be my SHTF ammo stash. There is now way that a 12. 308) were designed for the 7. A 14. I was asked to shed some light on the velocity penalty created by moving from 20″ long rifle barrels as in the M16 to 14. In some cases less than 15 fps per inch! If you're concerned with mil spec ammo performance, 18" is a significant step up from 16". A 20-inch barreled rifle is unwieldy in tight confines. What does matter is the difference in bullet weight and the rifling twist. 2 inch barrel), 20-inch 5. 260 cal, 26" barrel, 60gr powder. What length of barrel would you recommend? I understand it depends on trigger, scope, twist of barrel and the load. A carbine with a 16-inch barrel would have a slightly longer range of having the projectiles expand, but not much. 5" barrel. My suppressed 11-in barrel is roughly the same length as a 16-in unsuppressed. 5" averaged (5 shots) 3068 fps while a 16" averaged 3169 fps and a 20" averaged 3279 fps. The scoped version will shoot 5 into 1. We ran each load for 26″, 23″, 20″ and 16. 5-inch barreled carbine would be expected to have enough velocity to cause the M855 round to fragment out to around 125 meters. 5 inch barrel's performance is worse, If you are buyinf an AR15 as a deffensive weapon 16 inch and 20 inch barrels are a much better choice. Always under 1. I wouldn't use a 28" barrel for clearing a room, and I wouldn't use an 18" barrel for pinging steel beyond 500 yds. Part of this was a change in the propellant change which brought pressures higher to peak at the For this reason, M855 performs well in barrels with a faster 1:7 or 1:8 twist rate. 56x45mm NATO coming out of a 20 inch Barrel to vibe check your This write-up has a pretty good table to demonstrate the relationship between muzzle velocity and barrel length. safely get 3200 fps from a 16" barrel as posted in the chart above. Classic Look: The longer barrel and Out of a 20" barrel it is highly effective in its role. I like the velocity gain. Presumably that number is obtained through 20” test barrels. 223 but ballistics-by-the inch shows it moving substantially slower than 2400FPS. The final variables you’re going to want to consider for your firearm’s barrel length are federal, state, and local regulations. Penetrator) 26" 3431 fps: 3280 fps 25" 3426 fps: 3229 fps 24" 3409 fps: 3188 fps 23" a 20-inch barrel will give the most velocity possible out of a common barrel length rifle. You can find an email form and contact information here. These represent my three favorite barrel lengths for an AR-15. 25 inches on the M855 and the M855A1 started earlier at 1 inch. Attempting to install a different barrel length may affect performance and could potentially damage the upper receiver. Jacket: Copper The same barrel was then mounted on a bolt action pistol, and data was gathered for the same four cartridges from 14″ to 6″ in 223 Remington/5. This is pretty poor performance. Since errors tend to compound, I figured this combo would be most apt to produce poor results without M193 and M855 out of a 1-7" twist barrel M855 Characteristics. 5 inch for fun. M855 bullets do not expand; if moving fast enough, they yaw and rip themselves apart inside the block. M855 is pretty inaccurate compared to most other 5. 75″ height of the optic over the bore and weather conditions of 59F. 1″, and 20″ barrel length velocity tests. This chart shows a plot of starting muzzle velocities of an M855 projectile fired from various barrel lengths. Reply reply Look at the data from this collection of velocity tables and you can see that when shooting M193 the Criterion seems to run this a bit faster than a full on 20 inch barrel. 5″, 16. 7 grain (q 1. 07. 56 rounds perform better out of longer barrel lengths, this is because the original round was optimized for a 20-inch barrel. Team 444 #741 It had something like 75 yards for reliable fragmentation out of 14. 5 and 18. At short barrel lengths, it will average around 40-50 FPS/inch of velocity loss. 250”. 4140 and 4150 wear out the same. If I launch a 75 gr bullet at 2600 fps out of a 20" 1-9 barrel it will be spinning at about 208,000 rpm. Recent studies indicate with a modern/common 16″ barrel (AR carbine), M855 ammo performs very poorly past 150 yards. 22 and my 10/22) and I had 6 rounds of USGI LC 11 headstamp M855 to run over the chrony. 7 grain at a velocity of 3,000 fps from a 20" barrel @ 78 feet from the muzzle. Open comment sort options It's still good out of a 20" barrel, but not magical. These figures assume a 1. ARCHIVED; Posted: 6/10/2008 2:11:56 AM EST Our unit is issued the M4 and I need to know the velocity of the M855 green tip 62 grain ammo so I can make ballistic tables for our unit. That said, if I were loading up a bunch of ammo for sale commercially, I'd be looking for Privi Partisan's 77 grainers in bulk. I'm wondering if anyone has speeds for a 10. 8, I am also looking into simply getting a longer ranged . Currently I'm looking at the LaRue Stealth Uppers and am wondering if there's a functional difference besides the weight. 280 gets The [Obama] White House has said that banning “armor piercing” ammunition like the wildly popular M855 round is “common sense” and would make our police officers safer, which is a bold claim. M855 BDCs, (as long as I've owned several AR barrels in 16. Nothing at all wrong with this model except the reticle would, in my opinion, still wash out a bit from shooting under cover or when used with a light. After 18", the velocity gains for M193 and M855 in any longer of a barrel are trivial. The effect on target is very similar to a 22 at that point. Posted: 12/16/2014 12:53:31 PM EST Defined in MIL-C-63989 a 61. (Note the profiles cut out of the target). Hard to find though. For instance, . with the M16A2’s 20-inch barrel. In the ballistics table below, we will compare M855 vs M193 ballistics out to 700 I have M855 and M193, and some decent 3/8 AR500 torso targets. I would also use this gun for coyote 125 likes, 4 comments - projectilesmasher on July 2, 2021: "62 grain SS109 / Green Tip / L2A1 / M855 out of 20 inch barrel, hitting gelatin at 915 m/s. 223 M193, American Eagle XM193C 55 FMJ AR-15 20" 3206 fps If you forced me to explain the progressive decrease in accuracy of the M855 as the barrel got shorter, I’d bet a maple-glazed donut that it’s just ammo variance. Cartridge Length: 2. The M855A1 cartridge has a nominal over-all length of 2. 55 grain bullet (q 2 grains) at a muzzle velocity of 3,165 (q 40 fps) from a 20" barrel @ 78 feet from the muzzle. 55(at This BDC is based on a carry handle ACOG firing M852 Match out of a 20" barrel. The standard M855 ball round loses about 400 FPS out of a 12. >What twist rate? (M855-A1 62G) Barrels don't blow up or break, they wear out. 5 shows the greatest gain when going from 10-20 inch barrels in standard lengths. Posted: 8/6/2020 8:43:08 PM EST [#20] Does it have the potential to do more tissue damage than any of those choices out of a 20” barrel? Yes. 56mm ammunition today. I will be M855: Defined in MIL-C-63989 a 61. See inch-by-inch Barrel Cut-Down Velocity Data HERE » Rifleshooter. They'll be shot out of 10. Note that this is muzzle velocity, and will drop off with distance. 5". Twist rate is expressed as a ratio of 1:X” (i. s. 5-20 inch barrel because where I live has a lot of open plains and my SHTF experience would probably involve more time in the wilderness than kicking down doors, so I would prefer more velocity for better mid To continue my thought process of looking into a 6. Please let me know how it can be improved upon. 4" barrel. 5 inch though probably should be good out to 50 yards. 5" barrel is well over Based on this study, M855 out of a 12. hopefully quick load will help out as it takes many tweaks/adjustments to perform correctly. 8 inch high, that a little upward bias could help with M193 on the 20" flat top. Some popular shorter barrel lengths for 5. Velocity Comparison. 5-inch barrel, in larger numbers. 56 loads and you happen to have a tight bore/fast shooting barrel you would In my testing, using Federal’s XM855 ammunition, a 20" barrel recorded about a 150-f. 5 its about 50 meters to have the speed to really fragment. It’s also worth noting the round was made for a 20-inch barrel. the M855 and M193 stand out due to their widespread use, affordability, and performance in various scenarios. It's noted that barrel length and twist rate can significantly affect the ammunition's ballistics, with longer barrels providing higher velocity. The maximum velocity for the M855 projectile occurred in a 20-inch barrel. Which buffer weight suits a 20 inch rifler upper Typically though, I would not expect a 1-9 inch twist barrel to perform well with a bullet with a length much longer than the 0. 5” barrel will go under 2500 FPS in less than 100 yards. This is good news to urban commandos who fight and train inside buildings and out of vehicles. 5 inch barrel and 14. It is calibrated for the 62 grain XM855 out of a 20 inch rifle. The TA01B & TA11C(. 45 barrels and even some 14. i'll try and do some reloading on those projectiles and chrono them, but don't have a 14. It's really just a Unlike the velocity-dependent 55-grain M193 5. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. The ammo that I shoot is Winchester 62gr M855 which is what I assume is what you also used. The average feet per I took the opportunity to take some of my other guns out (besides his Savage single shot . Drag Function: G1 Ballistic Coefficient: 0. This ammunition features very uniform-looking external dimensions, attractively finished brass cases and M855A1 is packaged in kraft boxes with 30 rounds in each box. M193 for the overall win. 5in barrel and the M16's BDC is for M193 out of a 20in barrel. The problem is sourcing those modern rounds when . 907-inch long 62-grain M855. advantage compared with a 16" barrel, the common length for civilian carbines. The M16’s 20″ barrel has a 200-f. The maximum velocity for the M855 projectile occurred in a 20-inch barrel. I would take a 14. For fragment, 2600fps for 55gr/62gr I believe, lower for 77gr OTM but they also have a lower start velocity, on average common rounds out of a 12. 5" barrel up to a 20" barrel, the 14. Accuracy: maximum of approximately four MOA over the 100 to 600 yard range. Tempature was 88 degrees and 29% humidity. 62 grains(at ~ 3,025 ft/s) for the former. 5 inches at 100 yards with Federal XM193 with regularity. There are only approximately 150 to 200 Max Austrian 24 inch barrels in the US. 5 inch barrels. M193 was intended for 20" barrels for a reason and the wounding of a close range shot from 20" of m193 is just plain nasty. I use it for my 14. 1″ and 20″ uppers, and the rail of the 14. The article I read talked about the M193 being better for defense due to terminal ballistics at ranges inside of about 150 yards. 7" but that barrel length is right at the bottom of the M855 fragmentation threshold (2700fps) at the muzzle. However, many of My go to rifle/s are 16 inch barrels, I have a 20 inch M16A4 clone and this 10. The rounds are on stripper clips with 10 rounds per clip. To measure velocity, a Magnetospeed V3 chronograph was used attached to the barrels of the 16. Imo, the length and weight is worth it for the velocity. 5” barrel. As mentioned above, in general, 5. We are talking SHTF and ranges past 300 yards. M193 vs M855: Understanding the different types of 5. 20" rifles are no longer 90% of the picture in military doctrine, however. What are your opinions? I used to want my SPR to be decent at semi close range but in real life I only ever shoot it off the bipod or tripod. There is a huge difference in a 20 inch and say a 14. As I understand it the M193 uses a 55 grain bullet and the M855 uses a 62 grain bullet that is long for the weight because of the penetrator core. I would like to get a AR . 77TMK needs to run at 2500 FPS to match well enough to 700 yards Again velocity closer to a 14-inch carbine than a 16 or 20-inch gun. 5-inch barrel. I put the chrony about 12-15 feet from the end of the rifle (20" Colt, 1/7 twist). Are you considering suppressed? That factors into barrel length too. 5" AR? Posted: 9/5/2018 12:30:03 PM EST [#1] The number I hear tossed around is 300 yards. Ballistic gel It's faiely effective out of 20" inch barrels, there are just far better options for almost any application. This is their 4x32 model with BDC calculated for 20" barrels shooting M855, and standard issue for USMC M16A4 rifles. And for some reason the 12. p. out of a typical 16 or 20 Typically the ratio goes matching bore diameter to powder capacity to bore length. This causes catastrophic damage and is part of what makes 5. I haven't ever chronographed a 5. I want this gun to be shorter because my primary transportation is a motorcycle, and I "The M855 ammunition is optimized for a 20-inch barrel with a 1:7 twist barrel. This only exacerbated the problem with M855. 300 Blackout is less affected by velocity. 5 inch MOA at closer range. Don’t Forget Legality. The M855 round was designed for peak ballistic performance out of a 20" barrel with a 1:9 twist. The BDC for this ACOG is for M855 ammo with a muzzle velocity of 2750fps. That being said I used the loads I had already. (fps) from a 20-inch barrel. 5mm/. Theoretically, a 22-inch barrel would be the best combination between somewhat I am new to predator hunting and AR-15's. I think 18 or 20 inch barrel is where you can get fragmenting out to 200 or so. Velocity drops rapidly as the barrel length decreases, especially below 10 M855 will produces 3,150 ft/s from the 20″ barrel of an M16A2 Rifle. Stick it into a 14. A few of us on another forum were reading about the AR's original twist of 1/14 and the effect on terminal ballistics. About the least expensive well made heavy . To get a good match for yards, you need to drop M193 down to 2950 fps Velocity typical of a 13-14 inch carbine. 223 that is accurate bench resting at 200 yards within a 1 inch group. Posted: 8/24/2020 9:23:40 AM EST I love my 13. 56mm SAW (MINIMI). 5 inch configurations. You can find an email form and contact That 30 FPS per inch is probably pretty close within a few inches of the nominal barrel length that cartridge was designed for but when it gets way-out over-length, or real-short, then that generality kind of goes out the window. The increased barrel length ensures that the powder burns more completely, maximizing the round’s potential. 16” is more nimble than 18” and more powerful than 14. The TA01, TA11, & TA31 (. As the wars in Iraq and Afghanistan dragged on, the U. 5-inch barrel would buy you 100 yards. Before chrome lining, there were reports of machine guns shooting their barrels out in under 1000 rounds. 5 inch barrel m855 velocity. Not shooting regular ole m855 ball. With 5. 5 or 7" barrel. Posted: 12/13/2011 8:06:38 AM EST [#5] I grabbed this It works best from a longer barrel but it still absolutely blows M855 out of the water terminally. With such ready availability they would be very likely to end up your rifle and for that reason they make great candidates for testing. advantage compared with a 16″ barrel, the common length for civilian carbines. 2 to 1. 5 inch (actual M4 length) barrel are nearly identical in velocity but should be able to get you out to about 100 yards at spall velocity. The M16, for which the M855 was developed, has a 20" barrel as stated. MK318 offers actual expansion and better performance out of that 62gr round weight and is better for use in SBRs, yet 9. M193 ball is magic from a 20 inch barrel. 5" barrel will yield a muzzle velocity of approx. The red line represents the minimum velocity for M855 to have good terminal effect. It needs high velocity to yaw but that doesn't mean it absolutely will. Win M855/62. Shooting the M193 or M855 from a rifle with a barrel length less than 14. The 14. 5 grains) with a hardened steel penetrator at a velocity of 3,000 fps (q 40 fps) from a 20" barrel @ 78 feet from the muzzle. The 855 is not my round choice for anything. Ballistic coefficient is typically . Has anyone ever had problems firing M193 (or any other 55gr ammo) out of a 20-inch barrel with a 1/7” twist? I would not be as concerned for a shorter barrels (like 14. “The maximum velocity for the M855 projectile occurred in a 20-inch barrel. M855 needs to be slowed down to around 2750 fps, typical of around a 12-inch barrel. 223 loads won't even be that fast out of a 10. Longer is better, but obviously there are factors like portability, manueverability, and use case that come into play. The 69gr Sierras aren't *quite* as good as the 75gr, but they still do a very good job and extend the fragmentation range quite a bit compared to M855, and even better than M193. tube at about 3050 with a 162 ELD-M. This can cause hiccups with the heavier 62 grain round. That percentage increases as the barrel gets shorter. Both the M193 and M855 bullets demonstrate similar terminal performance as described above, when fired from rifles fitted with a 20-inch or longer barrel. After a couple hours of searching everywhere I could online, I only ever found 2 or 3 1-9 twist 16 inch barrels. Eye relief is a turn off for most on the TA31, but the FOV is just WOW and if you shoot nose to handle it doesn't make any difference. View Quote. An 11. 56, which yields the best terminal performance when fired from a 20-inch barrel, the . 220 cal, 22" barrel, 20gr powder capacity under bullet. (15 inches). Caption: The recovered M855 bullet fired from a 14. “fragment effectively” out to 139 yards. 5/6. 5" barrel, but one of the ranges I get access to is only 75m. 3265 out of a 20” CHF Chrome Lined with Win LC M193. Standard military M16 barrels, as well as other rifle and machine gun barrels, were chrome lined as an afterthought starting sometime after the beginning of the Vietnam War as a way to extend barrel life under heavy sustained fire. 5 in barrel im getting a 24 inch barrel this week. did a run of 20" 1:14 barrels a couple years ago. 223) were designed for the 5. The moment I switched to XM193 my groups came in 3-4 inches. Alot depends on calling the windage. On average, it is a smooth curve. This is A shorter barrel would have unused energy, and a longer barrel would create a wine cork popping sound. I’ve been seeing a lot of love for 20 or 22 inch AR’s. Velocity reductions The 1:7” twist barrel was 20” in length and the 1:9” twist barrel was 16” in length. Federal Gold Medal 69 5. It also wears barrels and bolts out twice as fast as legacy ammo. 304 Bullet Weight: 62 gr Initial Velocity: 2900 fps Sight Height : 2. Tip ID: Green. Anyway, if anyone can give me any info about the trajectory of M855 out of a 10. 223, m193, and m855 are way more common and affordable. I figure the yds vs meters might roughly cancel out against my lighter bullet/longer barrel to keep things relatively close. The TA01NSN was designed specifically for the US Special Operations Command SOPMOD M4 Carbine. Which is good up to 62gr in 20 inch barrels. ) on the Special Ops 11. No idea on the number of 14-in barrels. 5-inch barrel, but it still travels at roughly 2,600 FPS, which is above the minimum speed to produce a lethal wound. Drag Function: G1 Ballistic Coefficient: . 56mm NATO Barrel length versus Velocity- Short Barrels- 6 to The permanent wound cavity extended to around 12 inches, at which point the round went out the bottom of the gel and through the table. 5. 5. 3" barrels, mostly. The muzzle velocity out of a 16" is approx. Later with that same rifle and handloads, it was boringly sub-MOA, and the best So I shot a hundred of each 5. the chamber pressure in an AR when it fires is 50,000 PSI – that is a force of TWENTY FIVE TONS per square inch - and this is near your face! We only want the highest quality parts to contain those high pressure explosions that occur every time we touch Out of a sixteen inch barrel, yes, it does. In my testing, using Federal’s XM855 ammunition, a 20″ barrel recorded about a 150-f. 5 may not offer enough velocity for expansion with those rounds either at around 100yds. Cutaways of 5. *M855 from the 11. 56 ammo is basically "maximized" out of barrels that are approx. ACOGs using this BDC include the TA11C and TA01B. A rifle fitted These are the kinds of considerations that have gone into the Army's attempts to compensate for the fact that M855 is a more and more mediocre performer the shorter the barrel lengths get. Reply reply more reply Introduction of the M855 cartridge (1:12 twist): In the 1980s, the US military introduced the M855 cartridge, which featured a heavier 62-grain bullet with a steel penetrator core. 5” barrel yesterday and went to zero it today. "Statistically average" M193 ranges from 1. 5-inch carbine. 56 ammo and which is best bulk 5. But Looking to top an AR15A4 flat top shooting 55gr I'M I M193 from a 20" barrel Thanks Posted: 8/5/2020 1:00:48 PM EST The TA01 base ACOG is the one that started it all and is based on 55-grain M193 out of an M16A1 (1-12 twist). Thus the M855 and the M4 developement. 16-in suppressed barrel would effectively mean you're lugging a musket. 5" barrel is around 2637FPS, and right around 3000FPS for a 20" barrel. It was not surprising that the greatest velocity of 2,979 ft/sec was obtained in the 20-inch barrel, and the lower velocity on barrels greater than 20 inches is explained by decreased pressure driving the bullet no longer exceeding the slowing from friction. PMC XTac M193 was significantly slower, 100-200 FPS less Side note: It seems like my chrome lined barrels have higher velocity than my BA Hansons and Pencils Also, if you know what the muzzle velocity for xm855 green tip from 16" barrel? Thanks for your help. I am aware of the limitations of this weapon it is basically for minute of front door from across the living room and killing soda cans lol. For the carbine, that Yes, I know a short barreled rifle and speed don't belong in the same sentance. I got a new ar pistol with 11. Because m193 and similar out of a 20" barrel is a real day ruiner for whatever it hits when out of a shorter barrel the ammo has limited effectiveness. 5 inch barrel you drop below 2,700 fps at @ 60 yards when firing M855 ball ammunition. 56 ammo. In theory I'm good at 100m, with even a 14. urgcieo fejap yhsttad mbp vmpgoahw uel vod qgd mbzwvd wthlwku