I would suggest using a bullet that is .001 larger than your grove size .459 usually for 45 caliber. Swiss 1 1/2 usually works well
fill the case up and then if you have a compression die try adding more powder in 2 grain increments. We can tell you
what works good in our gun, but YOUR gun will tell you what works well in yours. I've dealt with buffalo arms, very good
people who will help you
BTB