Plan to recipe to range. I am beginning to understand how reloading effects accuracy. My test platform is my new Ruger newblackhawk in 45Colt. I ran 4 different loads using Acme 255 Grn poly coated SWC with Trailboss powder. My powder weights were 5.2,5.6,5.8, and 6.0 grains. COL is 1.589", roll crimp at top crimping band.
Here are my results, with caveat. I had to shoot sitting down on my Gator tailgate (still have back issues) and was at 20 yards. The winner by far were the loads with 5.6 grains of Trailboss three rounds touching (3/4 inch group), 5.8 grains was second with a 1.5 inch group. It was neat to be able to see the difference in loads. So 5.6 seems to be what my Blackhawk likes to eat. I plan on trying a few loads from the low end of spectrum - 4.2 and 4.6 just to see how low I can go and still stay on target ( light recoiling rounds for grandkids to use). I am having a blast. Thanks to you folks for helping me get started.