I recently purchased a 455 hand ejector 2nd model off of Gunbroker. It has been modified to shoot 45 Colt via counterbore of the cylinder. Would the below loading be hard on the ol` girl. I don`t think 45 Colt has too much of a pressure difference vs original 455 Webley.
255 Grain FMJ
887 FPS
255 Grain FMJ
887 FPS