I'd go plowhandle flattop Ruger Blackhawk in .44 special with the 4 3/4" bbl. To me, the bisley doesn't feel right and will wack your middle finger on heavier loads.
That would be 4 5/8's".
I like the plow handle for loads under 1000 fps with 250+ gr bullets. And the Bisley with heavier loads. That said, I have shot thousands of full power .44 mag loads with the SBH grip frame.
