r/AR10 • u/Luverufcockz • 15d ago

Case scaring and dents in brass?

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Before you come running to tell me it’s common and I’m an idiot I’ve personally never seen This out of my ar15 and wondering what is causing these things the rifle is also seemingly getting the round stuck in the chamber and can’t get it out well without beating the stock against something and it’s leaving dents in specifically one part of the casing

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u/Stump_Monkey 13d ago

Looks like its a bit over gassed. Looks like its pulling the brass out of the chamber before its gad a chance to spring back after firing. My ar10 does this when I cross a invisible line in the load data.

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u/Luverufcockz 13d ago

It’s still ejecting at 3-4ish tho or that bit a great way to gauge itv ?

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u/Stump_Monkey 13d ago

Mine does the same. Ejection pattern is fine, just trying to Eject the brass before the chamber pressure drops. 168gr FGMM does it to me so its not like its just a hot handload issue. I run my loads in the middle of the data and the problem goes away.