.223 primer pocket telltales?

some times i pick up once fired range brass, and have just examined several of them with the same head stampS as those in the photo, none are that rough. what's up with that. those look like the bolt face has a peace of sand paper glued to it... is that just me ?
 
Looks like fairly normal case heads to me, other than the little linear ding in each one.
I think you are all using too much imagination.
 
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