How to stop an AR15 cold

[HighLander51]

get a primer cup against the cam pin......

[FX-05 Xiuhcoatl]

That's a new one factory or reload ammo?

[HighLander51]

factory ammo.

[Mini14]

Wow....talented. Any more details on the incident? Ammo brand? First shot? 100th?

[pterrell]

I was warned about this while reloading but never heard of it happening on factory ammo.

[HighLander51]

Wow....talented. Any more details on the incident? Ammo brand? First shot? 100th?

Well it was the last stage in a 6 stage rifle match, probably more than 150 rounds. It had been acting up all day, 12" entry gun. Gas pressure is too high during the unlocking cycle which causes primers to blow out. Usually they fall away, but this one decided to get in just the right place.

[bohoki]

wow you were lucky any upper damage from the cam pin rubbing?

[tal3nt]

Haha that would have pissed me off! I doubt it would have caused any permanent damage

[HighLander51]

no damage

[bohoki]

well it looks like crimped primer ammo for your next match

[epwegmann]

I had a batch of Federal XM193 that had a nasty habit of blowing the primers out; reported the lot number but never heard back.

[SuperSet]

Sucks man. No remedial action. Did u get a reshoot?

[4x4Trooper]

Would a heavier BCG (if you don't already have an auto) or heavier buffer weight help with this?

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[Jel]

Well it was the last stage in a 6 stage rifle match, probably more than 150 rounds. It had been acting up all day, 12" entry gun. Gas pressure is too high during the unlocking cycle which causes primers to blow out. Usually they fall away, but this one decided to get in just the right place.

How does one address the high gas pressures?

[bsumoba]

had this problem with a loose primer pocket in my LR-308. Here was the thread.

http://www.calguns.net/calgunforum/showthread.php?t=870350