Each rifle is an individual, so somebody else's OAL is pretty much worthless. Distance from the lands may be of some benifit. With 1-12" factory bolt guns, I've had pretty solid luck with moly 50gr v-max's just into the lands, CCI BR4's or 400's, and a slightly over book-max charge of RL10x. Good velocity, low ES, great accuracy. Varying brass manufacturers and throat lengths may dictate slight variations in powder charge. I'm getting 3,250fps in a 20" barrel and 3,440 in a 24" barrel, although the 24" gun is running a bit heavier charge with a longer OAL and lighter brass.
