You can use .44 Russian, .44 Spl., .44 Mag. and .445 Supermag. Also see something called the .44 Rhino for reference. It's a bit too long for the Supermag as I recall. I think I gave around $400 for mine. I had the sticky brass problem with the early IHMSA brass and solved it by making cases from .303 British. H110/W296/Lil Gun and slower powders. AA1680/W680 proved best for me. No plated bullets. Jacketed OK.