I will have to try magnum primers with ball powders. I never bothered to use magnum primers in 308 size cartridges before. My go-to load in the 7mm-08 since acquiring my first (a Remington Model Seven) back in 1991 has been 43.0 grains of WW-748 and a 139 grain Hornady Spire Point. That is a Ken Waters load, and has shot well in every 7mm-08 rifle I have owned. I don't think Ken used a magnum primer in that load. I never have, but maybe I should try them.
I'm going to try RL-16 next.
