I'm shooting a 22-243 I'm using h4831sc, rl23 might be another good one to try. I'm shooting the 75gamax too. my load is getting 3500 using Winchester brass fed210m primers 26" barrel. My cousin had a 22-243ai he is using rl23 with the 77tmk. Both our loads shoot big holes. His is a little faster right around 3600.
43.5 is where I settled in but work up to thatThanks! How many grains of H4831 are you using?
What is your 7828ssc load? Thanks.I run imr 7828ssc