I recently purchased a S&W model of 1905 in caliber 32-20, circa 1916. The more I play with it the harder the trigger pull in DA. I lubed it up with no improvement. I loosened up the strain screw with no help in SA. My next move is a 2 week soak in transoil and see where that takes me. The hammer seems really heard to pull back in SA. I'm use to a S&W with a silk action especially a gun of this vintage. Mainspring seems way to tight. Any suggestions?