I read the posts about accuracy and throat and bore diameter. Slugged equals .450 cylinder throat and 440 groves and 450 lands??. Maybe got that backwards, but you get the drift. I cast and load my own. Light loads and bullets don't seem to work well. I load 300g FNGC .252 dia sized, with 20g 296 and they seem to work good. 255g hard cast PBFN, 9g Unique, work ok for target. 225g ACP bullets shoot like crap. Do I need to work on this or am I Ok. The drift I get is BHs like heavy bullets. I don't care. My groups are about 4" at 10y and about 6" at 25y. I shoot like I hunt, free hand no rest. One ragged hole site, large.