My father in law and I bought a pair of these a couple of years ago. Nice guns. I immediately changed out the recoil spring to a 16# and the mainspring to a 19#. That cured all the ills of both guns and they are both 100% reliable and a pleasure to shoot. Don't know why S&W made them sprung so heavily. The heavy mainspring may have something to do with the light weight firing pin. Anyway all's good now.