This is Jeff460 and I own a much customized 460V S&W X-frame magnum. With a five inch muzzle brake equipped barrel and full lug barrel profile it weighs just a pinch over 60 ounces unloaded. I sent my cylinder to TK Custom for alteration to use their stainless steel moon clips. The 45 ACP moon clip also holds the 460 Rowland, 45 Super and the 45 Winchester magnum using Starline brass reloads. A Cylinder and Slide extra long firing pin was installed and that made shooting rimmed cartridges without a moon clip fire just fine. So 460 S&W magnum, 454 Casull, 45 Colt, 45 Schofield and 45 Autorim all work without having to use a moon clip spacer. I highly recommend TK Custom for their work and service in this project. They make tough stainless steel moon clips. I use their loading tool and unloading tool though to save my fingers.