RE: What size round ball for .44 Navy pistol
I also have one of these. It has a .446 bore, even though there is a conversion cylinder available for it that allows one to shoot reduced load .45 Long Colt cartridges in it with lead bullets only. It has an oversized forcing cone - apparently figuring that a .452 bullet is going to be utilized at some point. I got my best accuracy with .445/.446 lead round balls.