Thanks for the info.
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Thanks for the info.
From a pure round count perspective, not a "let's do a bunch of mag dumps" perspective . . . Pat Rogers has a BCM with over 39k rounds through it when last I saw him post about it. Probably at least into the mid 40s by now.
No complaints about that barrel being shot out.
It's the STD barrel, not the BFH barrel. So says an article from USMC03, which I have no cause to doubt.
As someone pointed out earlier, I am looking for sub MOA accuracy when evaluating a barrel on one of my match rifles. A battle rifle is another story altogether. As long as the headspace is within safe limits and a carbine can shoot sub 4 MOA groups, I would not change out the barrel on a reliable battle rifle. I know of one individual who changed his barrel out after roughly 22,000 rounds and the accuracy turned to mud, but I did not have a chance to check the headspace before he tossed the barrel in the junk pile. The M4 video definitely shows what sustained automatic weapon fire can do to a barrel in a short period of time.
I once put 14 mags thru a M4A1 back to back to back as a trunk monkey in Iraq when the PKM we had shit the bed.
Gun what hotter than hell, and the Larue rail on it melted some of the ladder panels I had on it.
However the gun shot well into 1" with Mk262 when we had a range day later.
We've put 5k on a gun in an afternoon at KAC, suppressed shooting 180rd heat cycles (full auto dumps then cool with a water mister after the 180rds) the barrel shot within 3" at 100 at the end of the day with M855. However by 15k the next day accuracy was more of a pattern than group.
I have had a babied shooting team (Diemaco CHF barrel) gun that was only shot semi-auto that was still very accurate to 20k rds on it when it gauged out on headspace.
A lot depends on firing schedule and cleaning (I think honestly the beater endurance gun I talked about above would shoot a little better if we cleaned the copper out - the bbl was full of copper that got melted to the got bbl.) as well as the quality of the bbl you started with.
Love the title.. Yet to see a barrel shot out w/o shooting...
Don't believe the FN, m16, barrels hammer forged.
A barrel will show it's shot out at distance, 300m or so, as it fails to stabilize the projectiles at distance. 50m courses like Pat Rogers won't show degradation.
A barrel is not the same after being excessively heated... And can fail later due to damage to the crystaline structure of the metal. Which is why SOCOM now has the stupid heavy profile on their m4a1's.