Yes, but not extensively. With 140gr bullets, you need a long drop tube and a slow pour to get enough powder in the case, the load was compressed. Was running 4 grs more than RL 15 with very similar ES (17) and SD #'s (5), vel avg. 75 more FPS. Only shot (2) 5 shot groups, one was larger than the RL 15 groups that day, the other was smaller. That was back in September, been meaning to try to fine tune, but haven't gotten around to it yet....