best sr primers

Feb 18, 2012
Sparta, Tennessee
You’ll likely get better advice than this but I would just pick one and go. I personally havent seen much of a difference from one primer to another. I just grab whatever the local store has at the time. I usually get match primers for target loads if available locally but many times they aren’t and I haven’t seen a noticeable difference switching back and forth. I suppose if a person was going for absolute best accuracy you could try a few different ones and run the loads through a chrono to see which one gives you the best es.


Sergeant of the Hide
Jan 29, 2018
Cci 450 or Remington 7.5 would be my choice. That is a lot of powder for a small rifle primer to light so a hotter type primer would be my choice.
Jan 2, 2011
Western NC
The Remington 7.5 are definitely tougher. I had trouble in my bench gun (6BRX) blowing a hole through the primer where the firing pin goes through the bolt face. I tried multiple primers and once I went to the Remington 7.5 it has never happened again.
Sep 6, 2006
Southern California
Thanks for the help going to try 450 with the Peterson Brass how much less powder would I need

Cci 450’s (and br-4) have the same amount of priming mixture in them as a cci 400. Only thing that makes them “magnum”is the thicker cup to withstand pressure. No change in the load is needed. The 450 and br-4 are identical by the way. Don’t waste money on the br-4.