For a cast 150 grain load I use 13 grains of Red Dot. It won't cycle my M1's but is very pleasant to shoot with low recoil. I also use 150 grain cast gas checked pills and 13 grains of Red Dot for practice .308 Win, 7.62X54R, .303 Brit. 7.5 Swiss, 7.7 Jap.............just about anything in 30cal/7.62mm.