I thought the same thing, and since the guys at Hammer bullets recommend using mag primers with their bullets I decided to test both standard and magnum. In my 22-250 and 243 velocity was about the same, all other components being the same. In my 25-06 with 100gr Etips the average velocity was also about the same, but with 115gr Ballistic tips I had 49 fps average higher velocity with standard CCI vs CCI mag 250's. That I wasn't expecting. Also in every case I had lower standard deviation with the mag primers.Legitimate question: wouldn't using magnum primers cause pressure signs at lower loads, or am I overthinking that?
Generally speaking, I believe that's correct. Depends on the primers though. I haven't seen much difference but I've only used BR2s, 9 1/2Ms and 250Ms as that's what I have.Legitimate question: wouldn't using magnum primers cause pressure signs at lower loads, or am I overthinking that?