ORIGINAL: TUK101
I was reading an article the other day and the author said that he got better accuracy with regular large rifle primers with some of his magnum loads than when using magnum primers. I wondered about this, I know that I have heard of some people using magnum primers in their .06 and .270 rounds for more velocity, but I had never heard the opposite until now.
Some cases with rounds like the 270 with fast powder, mag primers can actually drop velocity. I have tried regular LR primers in my 300RUM's and STW's. I never saw much difference.