Has anyone installed a Wolf reduced tension 8LB. hammer spring in a S&W J frame, with a frame mounted firing pin, and experienced light strikes with any type of ammo ? I put one in, and experienced no problems with 50 reloads that I had with me. Have read some posts that said that a heavier spring is required for a frame mounted firing pin, but not sure if that applies to the J frame. This gun also has the MIM parts. Would I be better with an 8-1/2 LB. or 9 LB. for reliability?