Yep, my bad. Insufficient information. I really do know better, chalk it up to another senior moment. The rifle is a new Uberti in 45 Colt. Rate of twist seems to be 17 1/2". Seemed strange so I measured it twice with same results each time. Accuracy up to 50 yards is really quite good. Things seem to fall apart at 100 yards, which makes me think I need a longer, heavier bullet. Currently I am using a 200 gr. semi wad cutter, an old Hensley & Gibbs if I remember right. (it's the only 45 mould I currently have) I shoot black powder almost exclusively, (Swiss) and use SGP. Probably forgot something else, another senior moment.
Thanks
RS