Starline nickel cases hard to prime?

[Mopardoctor]

Picked up some 6.5 Grendel Starline nickel cases and with all of the time I have decided to load up some cases. I'm using #41 primers and they are taking extra effort to get the primers to seat flush. I had to bump all of the primer pockets with a primer pocket uniformer to clean up the pockets. Are plain brass Starline 6.5 Grendel cases hard to prime?

Mopar Doctor