I have read and read, looked at article after article. I really can't get a decisive answer. What is the maximum velocity one can achieve from a 140 grain amax for example out of a creedmor. I just received a gap crusader w/ a 27 " bartlein 8.5 twist, only reason I ask. I am 400 asl so the more the better for 1500 yard shooting. I have been very busy traveling over the holidays and have very little time to test loads but I found a good load at 42.2 h4350 with the 140 amax. It was raining so I could not chronograph. Group measured .186" at 110 yards. With no signs of op. sorry if I come across as ignorant but I have no experience with velocity #'s on the creedmor. Thanks