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've had this issue with NATO spec brass before , with both 5.56 and 9mm . For me it had nothing to do with the crimp , it was simply the pocket was not deep enough . I could get them to seat barely flush but it was hard to get there and they were pretty much flattened . I was basically crushing them into place .
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With nearly all of the rejects in the foreground, the primer was flipped .
You were trying to put the primer in sideways.
I suggest re-evaluating root cause,conclusions,and remedies. Perhaps your auto primer feed needs adjustment. Or you primer punch and cup. Primer pocket to priming punch/cup alignment,etc.
I do not doubt using the pocket uniformer can be good practice. I don't think it would solve the specific problem you show.