I’m building a AR-15 in 243 WSSM 24” barrel 10 to 1 twist, I would like to shoot a 70 gr bullet at 3700 fps,
I'm thinking 48grs of 4350 will do it, and naturally, I will work up to the max load. Love to shoot those dogs on the run at 500 plus yards. Any help
would be greatly appreciated, it...