I had a grip safety, EGW Jem fit to a Dan Wesson frame with a 20# recoil spring 19# main spring and totally flat FPS.. So after test fire I had some really heavy hammer marks in the grip safety cup. So far I have removed the marks, and knocked down the really sharp serrations on the hammer. Will a small radius on the FPS help? Or if I spring up the Mainspring to a standard 23#? I'm thinking this might be the direction to go. Any advice would be very much appreciated. I know sometime based on parts this can be unavoidable, but is there something else I can to to limit the chances of this marking again? The marks were pretty deep and they did happen while the pistol was in the ransom rest.