my rifle drives nails with the GMM factory loads. So my goal is to get that load duplicated and then tune from there to see if I can better the accuracy. So far I was told to load IMR 4064I started my load development at 42gr and worked up to 44 gr (max load) My max load avg 2624 fps and the GMM avg 2656. I assume I need to go to a faster burning powder to get the remaining FPS.
Any suggestions?
Any suggestions?