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Posted: 4/12/2011 6:59:06 AM EDT
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I have an older colt AR15A2 20" 1:7 rifle that can top off armadillos around 300m, possibly more if it was daylight. I've have read several articles about MK292 77 grain ammo being used by the military. It is reported on like it is some sort of super sniper combo. Some of the stories seem far fetched. What is the REAL maximum lethal range for a human chest shot with this round?
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A hole in th chest is a hole in the chest regardless of range. The question you ask is not so simple in that you never know how the human body will react to being shot....regardless to distance which is why there are people who have been shot at varying distances with the same ammo and some lived while some died.
I know a guy who got a confirmed kill at 475yds on a guy with a MK12 using MK262 ammo. I also know another guy who shot an enemy soldier in the chest at a little over 500 yds with 7.62 M118 ammo and the guy kept running. See my point? I'm no expert, but if I had to give you a number I would probably limit it to 600yds with the understanding that its not a magic bullet. Longer shots can and have been made, but out past 600yds heavier calibers are more suitable. MK262 ammo isn't even the greatest ammo when it comes to "killing" being that it actually uses "match" bullets, however that's what the military is limited to so they use it as its accurate and effective at longer ranges. |
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M855 is generally capable of hitting and killing a human being at 500 meters or more. Just because it doesn't fragment doesn't mean it turns into a Nerf dart. In my opinion, accuracy is far more important than terminal effect. So true! That was the point I was getting at about a hole in the chest is a hole in the chest.....its gonna give someone a bad day. Accuracy makes the biggest difference so a hole of any size through the right organs will determine the outcome. |
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Quoted: I have an older colt AR15A2 20" 1:7 rifle that can top off armadillos around 300m, possibly more if it was daylight. I've have read several articles about MK292 77 grain ammo being used by the military. It is reported on like it is some sort of super sniper combo. Some of the stories seem far fetched. What is the REAL maximum lethal range for a human chest shot with this round? "Real" maximum lethal range?  "Super" sniper combo?  If all you are talking about is the ability of the bullet to penetrate flesh then the answer is further away then you should be shooting. |
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M855 is generally capable of hitting and killing a human being at 500 meters or more. Just because it doesn't fragment doesn't mean it turns into a Nerf dart. In my opinion, accuracy is far more important than terminal effect. So true! That was the point I was getting at about a hole in the chest is a hole in the chest.....its gonna give someone a bad day. Accuracy makes the biggest difference so a hole of any size through the right organs will determine the outcome. Yup. And a 62gr projectile traveling at say 2,200 fps still has plenty of energy. Almost twice the mass and velocity of a .22lr, which has been known to cause hydraulic failure in quite a few people. The bullet will still yaw, creating a wider than caliber path through the body. I'm no geographist but I'm guessing a 5.56mm at 60m is still probably more terminally effective than a 9mm Gold Dot at 10 ft. OP: I'm sure someone will be along shortly to answer the question that you probably meant to as which was "At what range does Mk262 ammunition stop reliably fragmenting?" |
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Going off memory here, from other reliable posts, but I'm pretty sure it is well under 200 yards, especially from an M4.
While anecdotal events don't really prove anything one way or another, I do find it interesting in the above posted sniper recount, that: the guy that was hit at 790 yards took a round, dropped, and eventually crawled to his weapon and took up a concealed position, possibily trying to rejoin the fight. It took 3 more rounds to finish him (supposedly). While previous posters have already pointed out, there are a lot of variables and no one can predict the preceise human response in every event. However, the 5.56 round in this incident as told, doesn't strike me as a highly effective long range sniper round. Quoted:
OP: I'm sure someone will be along shortly to answer the question that you probably meant to as which was "At what range does Mk262 ammunition stop reliably fragmenting?" |
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Thanks for all of the replies. My A2 match is wicked accurate, better than I can shoot. I've seen all kinds of posts on this and related forums arguing about the lethality of the 5.56 round, how far x grain bullet out of y length barrel can go before it stops fragmenting, and all sorts of MK12 SPR stories. I was just trying to get a rough idea from folks who do this for a living.
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I took a marksmanship course while I was in the Army. It was pretty in depth and covered MOA, wind, distance calculations, etc. And believe it or not we were able to engage targets at 600m using a standard M4 with ACOG and 62 grn rounds. But of course the rounds just bounced off the plastic of the popup targets right? 
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Quoted: Quoted: I took a marksmanship course while I was in the Army. It was pretty in depth and covered MOA, wind, distance calculations, etc. And believe it or not we were able to engage targets at 600m using a standard M4 with ACOG and 62 grn rounds. But of course the rounds just bounced off the plastic of the popup targets right? That's funny. Though, at longer ranges, M-193 ammo did some strange things. |
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I took a marksmanship course while I was in the Army. It was pretty in depth and covered MOA, wind, distance calculations, etc. And believe it or not we were able to engage targets at 600m using a standard M4 with ACOG and 62 grn rounds. But of course the rounds just bounced off the plastic of the popup targets right? That's funny. Though, at longer ranges, M-193 ammo did some strange things. Does it get unstable? I've never shot M193 any farther than 200m or so. |
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I took a marksmanship course while I was in the Army. It was pretty in depth and covered MOA, wind, distance calculations, etc. And believe it or not we were able to engage targets at 600m using a standard M4 with ACOG and 62 grn rounds. But of course the rounds just bounced off the plastic of the popup targets right? That's funny. Though, at longer ranges, M-193 ammo did some strange things. Does it get unstable? I've never shot M193 any farther than 200m or so. No it doesn't get unstable. RedFalcon was probably aluding to the old BS stories about the bullet getting stuck in the paper targets and such. |
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Quoted: Quoted: Quoted: Quoted: Quoted: I took a marksmanship course while I was in the Army. It was pretty in depth and covered MOA, wind, distance calculations, etc. And believe it or not we were able to engage targets at 600m using a standard M4 with ACOG and 62 grn rounds. But of course the rounds just bounced off the plastic of the popup targets right? That's funny. Though, at longer ranges, M-193 ammo did some strange things. Does it get unstable? I've never shot M193 any farther than 200m or so. No it doesn't get unstable. RedFalcon was probably aluding to the old BS stories about the bullet getting stuck in the paper targets and such. No, that is not what I meant. Once M-193 is in the transonic zone, at around 600M or so, the bullet does do some hinky stuff in the wind, a lot like M-852 does at past 850M. Never seen a 5.56, or 7.62 bullet stuck in a paper target. I have seen .22LR bullets stick in plywood, but that is not what is being discussed here. |
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