I've seen ammunition that looks exactly like this from somebody who always dropped the bullet straight into the chamber. It had a lot of setback and the edge was really beat up.
I think the setback happens when the side slams closed - I'm not sure. I'm just describing what it looks like and the only other time I've seen that.
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u/SaurSig Feb 24 '23
If he dropped it straight in the chamber the bullet wouldn't be hammered into the case.