I can't add much to this.
However, I got 1K of this once fired brass and about 5% would not chamber and the problem was at the base of the cases. Upon further inspection, the brass had bulged.
I now run all these type cases through a Lee Bulge Buster die and now all the rounds chamber corectly.
I did not realize that Glock cases have that distintive primer strike mark. Since these often have unsupported chambers, this fact is good to know. That way, you can tell which cases have been fired using a striker and which are probably Glock fired.
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