Nosler #3 listed 39gr RL15 with the 55gr bullet. I loaded it with Hornady v-max and shot 1.5" 3 shot groups at 350yds at 3915fps. Nosler stepped it back in subsequent manuals to 37gr of powder. Just as accurate, but about 150fps slower. I think. It's been a long time. Jim Carmichel's go to load was 38gr IMR4064 and a 52gr match bullet, which also shot small groups. I finally settled on 39gr 4064 and the 50gr v-max at 4100 and change. 3/4" groups at 200yds are standard. This is all in a M70 heavy varmint. Don't know how to make it shoot big groups.
