IndyGunner
Master
- Dec 27, 2010
- 1,977
- 36
The flattened case mouths appear on 1911's that don't have the lowered ejection ports, i.e. the Springfield Armory GI models. The brass strikes the ejection port on it's way out. It is only a problem when one wants to reload the brass.The only thing I see with some regularity between 1911's and brass would be the flattening of a portion of the mouth of the case. Mine does it religiously when the front sight post isn't flying off (today). I have picked up a lot of range brass with similar flattening of the mouth of the case after watching folks shoot them from 1911's. Never any damage to the base...
Come to think of it - I've never seen any auto loader damage a base like that. If the extractor is badly warped inward it might clip the base like that. Just speculation on my part, though. Is it a new gun?