Anyone use this brass for 10mm? I have 2 different headstamps, one is "nny" & the other is PPU. I had a problem with the nny stuff, one was a casehead separation, and 3 case bulges, scared to try the PPU. The nny had only been reloaded 1 time, so fired twice. All of my other brass runs great, anyone use this brass with good results? Thanks for any help. 165gr. FMJ 10.4gr. Bluedot 1.26 OAL Colt Delta Elite. Wanna kill these ads? We can help!