If the hammer and trigger are not mating squarely for single action, then, in my opinion, the parts are defective and the factory should fix it. It is much easier to fix a hard action by lightning the springs, it does not work much to try to increase the single action weight by lightening the springs. When the parts do not mate, and the lighter springs are installed, pushoff can be just around the corner.

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Richard Gillespie
FBINA 102