I'm currently using both Peterson small primer,and Hornady brass in the creed. Both are holding up very well. I'm lucky to have a minimum spec chamber. The brass isn't getting much of a workout.
Put a 280 Remington cartridge in a 7 Rem mag and pulled the bang switch. I did in fact say "What!?!" along with several other expletives. Not enough material to make a 7 Rem mg case out of a 280. Just sayin.
Magnum primers in Hornady brass wanted to string. Cci 200 and h 4350 drills tiny little groups with 143 ELDX. Speed was sorry though. 2550 ave, double digit particulars.
Peterson small primer. Im getting an average of 2956 with the 130 and RL 16. If any comments look sketchy, Im at work on my phone. Sausage fingers,lol.
IV had the best results with RL17 and RL 16. This with the 130 Berger. Single digit E.S. and SD. Mid 2900 fps with 16. 100 fps less with 17. In a 24" Bergara.