Quote:
Rookie stated that his BP pistols were .44 cal but there is a large difference in actual bore diameters with BP pistols.
Telling someone to use .454 round balls is just nuts. I have four BP revolvers. All are .44 cal. made by ASM, Pietta, CVA and Uberti. Three of them require .440 or .445 round balls with .440 using a over shot wad and an over ball wad with grease around the edges to prevent chain fire.
My Uberti Walker I can load .445 round balls with double wads or .454 round balls.
He really needs to slug his gun or at least use calipers to determine what size RB to use.
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As Hawg pointed out, .454 seems to be the "gold standard" for most revolvers.
There's no need to slug the gun - the chamber determines the ball you need. If you shave off a small ring of lead, you've got the right size. If you don't shave any lead on loading, then the ball is not achieving an interference fit, and you are running a risk of chain fires.
Slugging the gun
is useful if you want to determine whether your chambers are matched to your bore for optimal accuracy.
But for loading, it all comes down to the chamber size. You gotta shave lead on loading.
My Pietta's (2 1851 brass Navies, 1 1860, 1 1858) all take .454. My Uberti Walker takes a .457.
Steve