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7.62x39 vs 5.56 ballistics gel

5.56x45 vs 7.62x39 - Cartridge Comparison - Sniper Countr

Can the WOLF do better than the Bear did? Of course is can!http://www.ammochannel.com/7-62x39-wolf-hollow-point Like me on Facebook http://Facebook.com/22plinksterFollow me on Twitter http://Twitter.com/22plinkster22plinkster T-shirt http://spot-prints.com/22plinkste 1,569. 5.56 vs 5.45 might be a better comparison. 7.62x39 is really in a class of its own. Ok, the 7.62x45 Czech, and the 7.62x33 German, but those aren't used much anymore. The .22 caliber bullets rely heavily on high velocity while the 7.62x39 is heavy enough to still have some umph at lower velocity

The 5.56x45mm cartridge has a slightly longer case length (1.76″ vs 1.528″) and overall length (2.26″ vs 2.2″). However, the 7.62x39mm cartridge has a larger rim diameter (.447″ vs .378″) and uses larger diameter bullets (.310″ vs .224″).That being said, the larger rim diameter of the 7.62x39mm is offset somewhat by the longer and less tapered case of the 5.56x45mm NATO A little testing of the 125gr 7.62x39 round in the clearballistics FBI spec gel block.www.facebook.com/mrgunsngearwww.twitter.com/mrgunsngearMusic:Music by M..

In this video, I compare the bullets of the worlds two most popular rifle platforms. The American AR-15 and the Russian AK-47. Let me know what you think g.. This is a 7.62x39 ballistics chart (external) generated using our ballistic trajectory calculator.This round is most used in AK-47s and their variants.. The average 7.62x39mm bullet is something like a 123 grain that is fired at an average of at 2,350fps The charting below follows the trajectory all the way to 1000 yards in steps of 50 yard increments Which is more lethal, 5.56x45mm or 7.62x39mm? It depends. If we look at two common military rounds, the Soviet/Russian M43 and the US M193 or M855, the smaller round is typically more lethal. This is directly related to how full metal case militar.. All credit goes to whoever did these tests!!!! Be sure to RATE,COMMENT,AND SUBSRIB

7.62x39 Vs. 5.56 NATO - The Informed Survivalis

7.62x39 vs 5.56 - AR15.CO

to fragment, the 5.56 needs a certain amount of velocity. typically around 20, really. most carbines (14.5, 16) don't really have the barrel length to generate enough velocity for decent/effective fragmentation. that said, the 7.62x39 isn't all that good, either. even the russians switched the AK platform over to the 5.45x39 223 or 5.56 as the military uses is a NATO round, as well as current military issue so they will always be around. This is give or take though, as the war rages on the supply of 5.56 is diverted from civilians to the military making supplies for civilians harder to come by. In any case the cheap wolf ammo will always be available

5.56 vs 7.62x39 ballistics. Dev Response. Hoping someone can add some clarity. To me it seems like the 5.56 and 7.62x39 ballistics are near identical in game. When in reality the later has almost 45% more energy at 100 yards but drops like a stone beyond 200. Anyone who has shot game with these two cartridges knows there's a significant. What I am trying to figure out is what has better ballistics when comparing a 7.62x39 round out of a 7.5 barrel or a 5.56 out of a 10.25 barrel. I heard somewhere that you can get about 1100 foot pounds with 1800fps at muzzle out of the 7.62 cartridge but I dont know what you would get out of the 5.56 and what the energy and drop turns into.

Pistol vs Rifle rounds for self defense

The 5.56x45 or the 7.62x39 Survival round Survivalist Foru

The 5.56's performance is less predictable. While the 5.56 can produce more damage, it won't do so every time. The 7.62 more predictable and hits harder. However the M16 platform as issued is by far easier to shoot accurately than an AK (I'm not g.. Also only FN makes it. Hornady, Winchester, Federal and Remington make both 5.56 and 7.62x39 (foreign 7.62x39 is cheaper to go with), and those are just the bigger names in ammo manufacturing. I was once in the I want a 5.7x28 firearm crowd, but that was just because of movies, TV shows and video games I need short (think, concealable), and wanted the x39 to make up for the ballistic shortfalls of the 5.56 round. Ammo availability/price is why I'm not going 6.5/6.8/5.7/etc. As far as ballistics, 5.56 55gr xm193 out of a 7.5 barrel would be going about 2100 fps. Leading to (at the barrel) about 489 ft lb of energy

The difference between the 5.56, 6.8 and x39 in gello, one inch. The best 5.56 wound channels are around 4 1/2 across. The best 6.8 and 7.62x39 channels are 5 1/2 across. This means a fella with a 5.56 could do almost the same damage if he's a little better shot. Bottom line of this long post, just pick whatever platform you like and practise Now 20 years ago, I read a TON of comparisons of 5.56 vs 7.62x39. Literally everything they say about the .300 blackout is what people said about the 7.62x39. Even a quick search of .300 blackout subsonic ammo turned up a $26 box of ammo, while a quick search of 7.62x39 subsonic ammo (same grain weight as .300 blackout) turned up $11 box of ammo In a military setting, the 5.45x39 because: 1. Its a much lighter round, which means you can carry more of it (about twice more) 2. It has a much flatter trajectory 3. In full metal jacket form (what militaries are allowed to use), its actually de.. 7.62x39 is inherently more lethal/damaging than 5.56/.223 its just a matter of letting the bullet actually. open up upon impact and work. Had the taliban fighters back in the 1980s seen russians shooting at them with. 7.62x39 that really opened up instead of FMJ there would not be a poison bullet story to tell instead it might be more lik

7.62x39mm Gel Test - 7 Loads Put to the Tes

  1. 7.62×39 velocities in various barrel lengths chart. If you need a small package without sacrificing much thermal performance due to a shorter barrel, the 7.62×39 is perfect for a SBR AK or an AK pistol. Unlike the lighter 22 cal (.223/5.56×45) which relies on high velocity for it's devastating thermal ballistic results
  2. 5.45 used to have the advantage of being the cheapest centerfire cartridge around; now since the import of 7n6 milsurp has been halted, the new production ammo is about the same cost as 7.62x39. 5.45 has similar trajectory/ballistics to 5.56 and recoils less than a 5.56 AR, it is also generally more accurate than 7.62x39 in an AK
  3. B 5.56 NATO 62 gr. FMJ (20 Bbl) 81263 3060 2714 2394 2095 1820 1571 1289 1014 789 604 456 340 -1 5 16 0 -7 7-234 -49 SM 5.56 NATO 75 gr. BTHP (20 Bbl) 81264 2910 2676 2453 2242 2041 1851 1410 1192 1002 837 693 570 -2 4 12 0-7 -21 -433 B 5.56 NATO 75 gr. InterLock ® HD SBR™ (20 Bbl
  4. al ballistics out to 350 yards. Either would do with bullet selection being of prime importance
  5. The 7.62x39 is approximately the equal of a .30-30 rifle cartridge, but there are very few bullet designs Multiple round, high velocity 5.56 75 grain Hornady BTHP vs 77 grain Nosler BTHP performance in bare gel. 2) Multiple Round, High Velocity (NATO Pressure) 5.56mm 77 grain OTM (Mk262 Mod 1) performance in.
  6. al ballistics than the best-designed 5.45x39 mm round. Many Spetsnaz guys do prefer 7.62x39 mm. Lately, they've been getting rid of their old AKMS' and replacing them with AK-103s
  7. I can shoot 1400 rounds of x30 for the same cost as 1000 rounds of 5.56. that's 7000 x39 rounds for the cost of 5000 5.56 rounds. As much as i respect the 300AAC, for a .30 caliber round, the x39 simply out performs in range, energy, period. perhaps the 300AAC outranks the x39 in suppressed, subsonic only, until we get cheap subsonic x39 ammo

In this post, Rifleshooter.com will be testing the effects of barrel length on velocity for the 7.62×39 mm Russian Cartridge. Chambered in the SKS and AK-47, the 7.62×39 mm Russian cartridge is well known throughout the world. Ammunition tends to be widely available (it was first introduced in 1944) and inexpensive, making it an attractive. To the best of my knowledge AK-47's are really only made in 7.62x39 (absent a custom and or brand new production rifle). AR's can host a 300 blackout upper, which is similar in ballistics to the 7.62x39 round, but at the end of the day your still comparing apples to oranges for reasons other than ballistics superior depends on the criteria. There is no such thing as overall superior a .50 cal BMG is overall superior (according to the criteria of some responses) but totally impractical as a main battle rifle. TL;DR: The 5.56 is vastly superior.. Euro steel - 840 g x 6 = 5.04 kg or 11.11 lbs. - [and so you can see the difference in ammo itself:] -. 5.45 7n6 - 30rds = 316 g or 0.70 lbs. 7.62x39 FMJ - 30rds = 492 g or 1.09 lbs. So even without the heavier magazines, you gain an extra 2lbs per combat load just from heavier ammo

SBR for Home Defense- 5

Welcome to Brass Fetcher Ballistic Testing. We are an independent third-party ballistic testing company providing standardized terminal and exterior ballistic testing services to ammunition and firearm manufacturers, law enforcement agencies and law-abiding gun owners Tale of the tape in bare gel: 7.62x39/16 inches Saspan 124 HP 15/.63 Win 123 SP 14.4/.56 Wolf 154 SP 20+/no expansion 5.56/16 inches Win USA 55 FMJ 14.3/fra

223 vs 7

So if both the 5.56×45 vs. 7.62×39 rounds are commonly employed by national militaries determining which is the superior long-range round for the average shooter can be a difficult undertaking, and almost certainly will involve a degree of bias (in other words, in some conditions, it may simply come down to preference) We'll talk more about how the 5.56 and 300 Blackout stack up against one another in a moment. Summary: The 300 AAC Blackout is cartridge designed to work in AR-15s and other rifles with shorter-than-average barrels. It fires a .30-caliber, 110 to 220-grain bullet and reliably works with and without a suppressor

Compare Krink Ballistics - 5

It takes a number of steps to craft rifle brass. When it comes to .223 vs. 5.56, the 5.56 gets two stamps onto the head, to harden it more..223 vs 5.56: A History. To a whole lot of shooters, ammo is ammo—if it fits, it shoots. These shooters tend to be the guys with seriously tired, worn, or even busted firearms Heavier (60gr and up) 5.56/.223 TAP rounds are rated to penetrate windshield glass. Now, how GOOD they are at that I am not qualified to answer, but they will go through. Looking specifically at the question at hand, I would grab the 7.62x39. Mik Wolf 5.56 Hollow Point Ammo. Lapua .224 70 & 77 grain. .338 Terminal Ballistics info. 7x46 and 6.5x47. Test: Double Tap 155 gr Gold Dot vs. Speer 165 gr Gold Dot. expanded diameter. Doc, any .50 BMG wound ballistic info? .223 updates and testing. A question on short barrel ammunition selection Federal HST 147gr. vs. 147gr. +P? 3 ballistics.357 Magnum Carbine vs. 5.56 16? 10mm gelatin tests; 5.56 vs 9mm penetration question; 7.62x39 winnie pdx1 round.223 / 5.56 CQB effectiveness. Layers of Denim and Protocol; 3/8 AR500 as armor and back face trauma questions; Gelatin tests: 10mm 200 gr Gold Dot, 175 gr Silvertip, Underwood 165 gr Go 356 Posts. #11 · Apr 11, 2012. saskcop said: The reason that it is hard to find a good comparison of 7.62x39 ammo is because for the most part - it all not only works, it is highly effective. The reason there are so many 5.56 comparisons is that everyone is trying to find one that is truly effective

Yet, not only does the 5.56mm handily outperform the old German 7.92×33 Kurz in ballistics, it's substantially lighter, too. Compared to 12 grams per shot for M855, the Kurz clocks in at 16.7 grams per shot for wartime steel cased ammunition, or 17.6 grams for current-production Serbian manufactured brass cased Both cartridges are very similar so we need to look at other factors besides ballistics for an answer. When cheap and effective 7n6 ammo was legal to import into the U.S., that was a plus for the 5.45x39 but that inexpensive ammunition can no long.. The 7.62x54R is the largest and the 7.62x39mm is the smallest cartridge in terms of case length, overall length, rim diameter, and case capacity. However, the 7.62×39 and 7.62×54 both have the same bullet diameter. Additionally, the 7.62×51/.308 Winchester and 7.62×39 are rimless cartridges while the 7.62x54R is a rimmed cartridge

However, I do believe for longer range shooting, the ballistic coefficient of friction (and overall accuracy) of the 5.45 to be superior to the 7.62x39, which drops like a stone. My Bulgarian 74 will shoot into 1.5-2 inches at 100 yards. Try to get that accuracy out of your average 47 7.62×39 vs 300 Blackout Ballistics. As you'd expect from their similar overall size, the ballistics of the .300 Blackout and 7.62×39 are pretty similar as well when using similar weight bullets. In fact, they're both roughly comparable to the .30-30 Winchester. However, the .300 Blackout is available in a wide range of bullet weights The 7.62 X 39 round would be real good for personal defense in some cases. The trouble with the X39 cartridge is that it has a lot of penetration behind it. You may want to rethink using the 7.62 X 39 ball for an apartment defense round. Most apar.. Under 100 yards either 5.56, 5.45 or 7.62 will be adequate performers with barrels of 10.5 or longer. Once you get below that the 7.62x39 will work better. 7.5 barrels in 5.56 or 5.45 will not fragment beyond 25 yards and if the twist is too fast they will perform like a 22 LR because they will not tumble at all

.223 FMJ VS 7.62X39 FMJ in ballistic gel - YouTub

That's because the 7.62 is almost twice as massive as a .223. In the technical language of ballistics engineers, the standard unit of measurement for a bullet's mass is grains of metal, and depending on the manufacturer, a .7.62 can weigh in at 125 grains. A .223 is just 55 grains The Military 7.62x39 mm M43 utilizes a 123 grain mild steel core FMJ projectile traveling at an average speed of 2,421 ft/s. 5.45x39 mm Rounds Both the 5.45x39 mm 7N6 steel core and the commercial lead core rounds are the Russian competitors to the 5.56 x 45 NATO M855 / SS109 steel tipped round While I agree about the need for a more controlled study, all the ammo is listed (golden tiger for 5.45, 7,62x39 wolf for .233 and .308) and none of it is steel core. While I guess he could have lied, MAC is pretty reputable anxiety doubt he'd do something like that. Edit: fixed it to say wolf. 12 M1 Garand vs. M1 Carbine. The M1 Carbine is a handy weapon that weighs in at just over five pounds, and it fired an intermediate powered round, the 30 Carbine ammunition.The M1 carbine was.

GEL TEST: 7.62x39 WOLF Hollow Point bullet expansion in ..

This test was over 3 occasions and the 5.56/.223 is very hard on ballistic gel. Bullets shot from the 16″ barrel are on left and the 11.5″ on right as recovered shot through the 3 layers. From top to bottom, Hornady 75gr TAP, SBR, Hornady 55gr FMJ, Hornady 55gr V-Max, Winchester 55gr Frangable, Stillwood 68gr BTHP, M-855, Hornady 75gr NATO 1. Logistics: You can carry more of a lighter round than you can a heavier round. It would also be important to note that the firearm for each caliber is going to weigh more or less in proportion to the ammunition. So an M249, shooting belted 5.56.. Make it a KNOCK-DOWN, DRAG-OUT hunt! ®. Opening day of deer season comes only once a year. Make sure you're ready when the big one steps out and load-up with Hornady ® American Whitetail ® ammunition.. Loaded with our legendary Hornady ® InterLock ® bullets in weights that have been deer hunting favorites for decades, American Whitetail ® ammunition combines generations of ballistics. I posted gel tests of 5.45 vs 5.56 a long time ago... 5.45 wins imho, but I wouldn't want to get shot with 5.56 either. One thing I've noted is that if someone doesn't have enough body mass to stop 5.56 and cause it to fragment, then m855 can pass right through

7.62x39 vs .223 (5.56) vs bulletproof glass - YouTub

The 7.62x39 is approximately the equal of a .30-30 rifle cartridge, but there are very few bullet designs Multiple round, high velocity 5.56 75 grain Hornady BTHP vs 77 grain Nosler BTHP performance in bare gel. 2) Multiple Round, High Velocity (NATO Pressure) 5.56mm 77 grain OTM (Mk262 Mod 1) performance in. Currently in the rifle forum there is a .223 vs .308 and in the military weapons forum there is a 5.56 vs 7.62x39 debate. Why can't a moderator or who ever has the ability make a thread of 5.56 vs 7.62x39 vs 7.62x51 thread so a new one doesn't come up every couple of weeks

An honest evaluation of the 7

  1. With a standard-weight 123gr bullet, 7.62x39mm from the 20″ barrel of an SKS outpaces .30-30 in energy from the same length barrel by just 50 yards, so poorly shaped is the bullet of the old WCF. Where .30-30 shines is that factory loads with much heavier bullets (up to 170gr) are widely available; besides a handful of hard-to-come-by 154gr.
  2. The standard Com block bullet has been 123 grain offering. Many manufacturers make it in FMJ, JHP, and some in soft point. Forget them for hunting. Wolf offers the 7.62x39 in a 154 grain soft point. I have fired a few in water soaked newspaper, poor man's ballistic gel, and it has shown effective expansion. Much better than the JHPs in 123 grain
  3. If you're using the x39 for personal defense, there are definitely better rounds. CorBon makes a 123gr DPX round that should perform well. I'm currently using 5.56 Optimized or 64gr Gold Dot in my long-guns, and 127gr +P+ T-Series in my G19 and Speer Gold Dot SB 124gr in my Shield
  4. al performance. But — unlike ordnance gel, and live tissue — it contains no water and therefore produces some odd results when compared to real ordnance gel
  5. 5.56 was built to run out of a 20-inch barrel. That gives near ideal velocity and full powder burn, usually in the 3,100 to 3,250 fps range. Every time we cut the barrel off, we lose some amount of velocity, and it is also not a straight graph line. It also varies by some degree per barrel manufacturer
  6. Wish the Box-O'-Truth would have put various 5.45, and various 5.56 head to head on the exact same test, but oh well. Neither 5.56 or 5.45 penetrated all that much in comparison to 7.62x39, or 51, I think we all know that. I think 53gr 7n6 is better than 55gr m193, but comparable in function. I think you need post 1987 7n6 or 7n10 to compare to.
  7. 1.) you want to practice with regular FMJ (full metal jacket) ammo because it's the cheapest 2.) you want modern JHP (jacketed hollow point) ammo for self-defense 3.) because of bullet projectile technology improvements since 2007 practically all service caliber handgun projectiles perform the same, so I recommend people use 9mm because it's cheaper, easy to shoot, and gives your more.
MFS 7

223/5.56 vs 7.62x39: What You Need To Know Big Game ..

I have seen MANY discussions of 7.62x39 vs 5.56 and generally figured it boiled down to preference. Recently I have been thinking more about the performance of different loads in each caliber. Not really one vs the other, but load vs load in the same caliber. With my purchase of the M92PV which w.. 5.56/.223 ballistic test carbine vs SBR I have been working on a a few projects for Barnes Precision Machine, one of which was a ballistic test for a common barrel length for SBR and compare that to the AR-15 carbine 16″ barrel. Some history of the 5.56 to begin with. The 5.56x45mm NATO began life [ Ballistic Packing a Ford F-250 Off-Road-Ready with a 75,000-Lumen LED Light Bar. Own the night by adding the over 75,000-lumen LED light bar, from Baja Designs, to your off-road-ready Ford F-250 for overland travel. Ballistic Q&A with High Bar Homestead Owner, US Air Force Vet Drake Clark Complete 7.62x39 ammunition ballistics Chart. Compare all 7.62x39 ammunition manufacturers on one easy to read chart

Speer LE Gold Dot 223 64gr GDSP Ballistics Gel Test (#2

Silver Bear Soft Point 7

  1. Well, the exterior ballistics of the .300 BLK and 7.62x39 are close, so I wanted to see how it would work. I mounted it using a set of M10 medium-height 30mm rings from American Rifle Company Inc. They use just two screws to secure the ring to the rifle and the scope inside the ring, and they're fast to install
  2. Rifle Recoil Table. For every action there is an equal and opposite reaction; that is one of the physical laws of our universe. This means that the momentum of a rifle's reaction will exactly equal the momentum of the bullet and powder gasses ejected from the barrel. In the shooting sports we call that reaction recoil or kick
  3. Basic Rifle Accuracy and Ballistics As a hunting guide the biggest problem I am faced with (besides locating game) i... .303 (.311-312) Cal FMJ military 7.62x39
  4. Ballistics Gel Testing, Lucky Gunner. While a full metal jacket round will still drop a bad guy, a hollow point will do it just a little bit better. That's not to say there aren't all kinds of misconceptions about hollow points as well. What I want to do today is talk about both rounds and touch on the misconceptions of both
  5. No. The 300blackout was created independently and for a different purpose than the 7.62x39. 7.62x39 was invented to be an intermediate round for Russian assault rifles. As such, it's designed to shoot at high velocities (around 2400fps) with hig..

7.62 VS 5.56 Head to Head - YouTub

  1. 0. We down loaded some of the 7.62x39 DPX loads to 1800 fps to check this out. We still got perfect expansion with penetration of 18 in 4 layer denim clad 10% ballistic gelatin. Michael Shovel. VP/ Sales and Media Relations. COR-BON/Glaser. Mike@CORBON.com. 10-28-10, 11:50 #7. caprice
  2. Hell on gel. Fort Scott Munitions provided TFB with Clear Ballistics 10% Clear Gel to test the efficacy of their TUI bullets on soft tissue. Both the 5.56 and .308 rounds demonstrated two very large temporary wound cavities within a 20″ gel block shot at 100 yards. The 5.56 round in particular exhibited quite a bit of yaw in that short space
  3. The 6.8 SPC delivers 44% more power than the 5.56 on average. It's also a better performer from short barrels. The 223, which the 5.56 is based off, is designed for 20-inch barrels. 20-inch barrels aren't exactly popular options for close quarter fighting. Once you start chopping barrel length down, you start killing ballistic performance

7.62x39 Ballistics Chart & Coefficient GunData.or

Best 5.56/.223 Home Defense Ammo? This would be for an AR15 type carbine, 16 barrel, mid length gas system, 1:9 twist. Wall penetration with .223 should not be much of an issue inside this old, solid built house and all bedrooms are on one end anyway It does tumble, but the side profile of a 7.62x39 bullet is really just not that big, especially next to the size of the hole that a fragmenting 5.56 would make. And while the temporary cavity looks impressive in slow-mo gel vids, in practice, human muscle tissue is flexible enough that the affected flesh will just snap back into place with. The 7.62x39 was the first, fully and widely adopted assault rifle cartridge, appearing decades before the 5.56 (.223 Rem). Regardless of the official adoption of the SKS and AK 47 rifles, the Mosin rifle continued to see service throughout the Eastern Bloc and with other communist nations well into the 1960's Terminal Ballistics Research : Specializes in the research of cartridge & projectile performance, using hard data gathered from 20 years of hunting game. We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our ammunition and other supplies, he was the brilliant gunsmith who.

403 Forbidden7Travis Haley on the 300 AAC Blackout - The Truth About Guns

Ballistics Gel I have an ongoing debate with my brother in law as to whether the 1:7 twist is superior to the 1:9 twist. I am in favor of the 1:9 while he favors the 1:7. My reasons for supporting the 1:9 are stated in my previous post. We are discussing making up some home made ballistics gel to conduct our own tests Terminal Ballistic Information [Archive] - Page 4 - M4Carbine.net Forums. Remington Premier Match .223 62 gr BTHP Experience. A look and comparison between carbine ball ammos - 5.56, 5.45 and others. FBI ammo policy in 1986. Brown Bear 62 grain JHP ammo. Question about fragmentation/yawing in the 5.56x45 The 224 Valkyrie is based on the 6.8 SPC case and retains the same rim diameter. However, to make the cartridge compatible with long and slender bullets, with ridiculously high ballistic. So, when you're dealing with an animal like a coyote, which can range from 1.9-2.2 feet in height at the shoulder and weigh anywhere from 15-46 pounds — and happens to run between 35-43 miles per hour — you'll take all of the ballistic help you can get. The .204 Ruger's ultra-flat trajectory is quite a bit of help So, if cost matters to you (and it does to me) there's a clear winner in this 5.7×28 vs. 9mm battle. Price Comparison Advantage: 9mm Luger. Muzzle Velocity - 5.7x28mm vs. 9mm. Speed is an important factor for ballistic performance, impacting accuracy, trajectory, energy, and penetration 223/5.56 vs 7.62x39: What You Need To Know Big Game . Thebiggamehuntingblog.com DA: 25 PA: 19 MOZ Rank: 45. 7.62×39 vs 5.56 Ballistics The table below compares 55gr Hornady Frontier M193 (.243 BC), 62gr Barnes TSX BT (.287 BC), and 70gr Barnes TSX BT (.314 BC) loads in 5.56x45mm NATO to a 123gr Hornady SST (.295 BC) load in 7.62x39mm; This data is for Hornady and Barnes factory ammo and a 200.