So what's your opinions on using small rifle magnum primers vs non mag vs AR match primers in the lapua SR primer brass for the 6mm creed? I'll be using H4350, R16 and possibly H4831.
Use magnum or AR match primers - hotter flame and/or thicker/tougher cups needed for higher pressures. I used CCI 41's for years in 6.5X47 Lapua small primer brass with ball powders.