I shoot 200 gr .45 bullets in both a Walker and a Dragoon with good results. Both pistols have had an 11 degree forcing cone cut into them. I think it is an essential modification to shoot conicals in these big pistols. I also chamfer the chamber mouths just enough to prevent shaving lead off during loading both round ball and conical bullets. I definitely don't agree that shaving a lead ring off a ball is a good thing.