Probably from an extractor if it is a burr on the rim of any sort.
I have never had 1 piece of our 300blk brass not fit in a gun out there, so if it is right from us, load and go
Even the small burr won't normally effect anything.
Body buldge at the bottom will still be smaller than SAAMI Spec and will fit in your gun
Quote Originally Posted by Guns4545 View Post
These are from you Wes. You use a small base die correct? It seems where the case head is there is a burr and slightly out of round. Probably from the extractor.

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