Re: .44Spl. bullet size
I have not loaded 44 Special Rounds for a Ruger for time just a Smith 624. As suggested the be accuracy came with the .430 bullet. To get there I use a .431 bullet sizing die and basically shoot the bullet as cast. This stopped leading problems in the Rugers. Another thing that will ruin your day is bullets that are cast too hard giving rise to gas cutting. I'd look to .430 diameter 429421 style bullet Try those Skeeter Skelton loads. Incidentally, I was loading for three Rugers and a S&W 624.