Not in battle, during a day of SRT training. We had lots of M855 to burn off, and the LT told us to expend it all before we departed the range. This was a typical .mil rack grade M4, and got shot alot, so I'm not are about the condition of the barrel. I do know we shot alot that day.
In reality, I'd keep the M4's on semi and use crew served if FA fire was called for.

Originally Posted by
payj
When you did that, was it in a battle? I'm tring to figure if in a realistic situation if it would happen. I would be in semi auto though. Your saying 420 rounds back to back in three round burst may have been bad, but do you think it ruined you barrel? Or do you think if it cooled down it would be gtg?
SSG Jimmy Ide- KIA 28 Aug 10, Hyderabad, AFG
1SG Blue Rowe- KIA 26 May 09, Panjshir, AFG.
RIP Brothers
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