Just bought a Cimarron, .44 Colt replica last Saturday. It will fire .44 Colt or .44 Russian, but NOT .44 special or, of course, mag. I've reloaded for some time now--.45 Colt, .38 special/.357 mag, 30 06, 5.56 and have a .44 Russian Lee die set on the way along with brass and .430 diameter...