Old thread I know. However, I wanted to say that S&W bends the Wolff mainspring when adjust trigger pull to 10 lbs on their PC guns. Bend in the middle, no kinks, and measure pull weight. Adjust as needed.
I personally like the Wolff Reduced power spring and a socket set screw with the proper loc-tite. I think Tomcatt51 turned me on to that.
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