Walt- My post addresses only the recoil spring rate, not the firing pin spring, as it is usually customary to increase the recoil spring rate, when one reduces the mainspring rate, as the slide cycle pushes the hammer with less resistance when the mainspring rate is reduced. The two spring rates are additive. I've done this to other pistols to get better DA trigger pulls and yet not allow the pistol to batter the frame by increasing the recoil spring rate. I've not bothered to play with the mainsprings of my 9mm Tanfoglio pistols, rather allowing them to "season" with use, but later on will probably have to increase their recoil spring rate, as their mainsprings wear. Was wondering if this competitor had done likewise.
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