NOTE: This is listed as Ruger T/C Only load data, with significantly higher pressures than SAAMI specs for .45 Colt caliber, it is meant to be used in full size Ruger Blackhawks, Super Blackhawks, Redhawks, Super Redhawks, Original Vaquero. DO NOT use this load data for any medium frame Ruger (New Vaquero, New Model flattop), Colt SAA, S&W, Colt clones!
If your Ruger SA revolver has a two digit prefix in the serial number, it is safe with these loads. If it has a 3 digit prefix in the serial number, it is a medium frame revolver and is NOT SAFE with these loads