Primers sticking out

[JimTom]

Treat yourself to a satchel of say, ADI brass. I bet your problems go away.

Couldn’t agree more mate. Reasonably priced and works.

[wanneroo]

That sure as heck looks like crimped brass to me. If it's the TAP rounds, those are used in law enforcement and perhaps military applications and often rounds that will be fired full auto will have crimped primer pockets.