I use 200 grain SWC's in .45 Colt quite a bit. I just seat them so the shoulder of the bullet is about 1/16" below the case mouth and roll crimp over the shoulder of the bullet. I use light to medium target loads, usually with HP-38/W231 and get excellent results in a Ruger Blackhawk, S&W 625-11, and a Colt 1909 Army.