Have put Wolf springs in at least a dozen guns, mostly S&W revolvers. In S&W K or L frames I usually use the standard tension Power Rib mainspring with either an 11 or 12 pound reduced tension rebound. Makes the trigger pull a little lighter, and smoother. I also do some polishing while in there, especially to the rebound block surface and edges.I don't touch the sear. Have not had any problems with light strikes using those springs, although I keep my guns really clean inside and out. Wolf also makes a reduced power mainspring, which I used in one gun. Pull was even lighter with the reduced power, and there were no light strikes. I just don't feel comfortable with a reduced power hammer spring in my gun.