There is another factor that sort of gets glossed over, and that is hammer mass. Firing a primer requires a certain momentum, a combination of mass and speed. If a hammer with a low mass (as in a J Frame) has enough speed from a strong spring, all will be well. If a hammer of higher mass has a lighter spring, all will also be well. But combine a light hammer (especially one that has been "de-horned") with a light spring and you may find a bad guy being very unimpressed by a gun that goes "click."
So before going about tinkering with the springs on revolvers, especially small revolvers with light weight hammers, make sure you know what you are doing. And if you do a "trigger job" that weakens springs, and the gun is to be other than a "safe queen" or a range only gun, make sure it will continue to function even if cold or dirty. BTW, just buying commercial "light" springs does not guarantee that the will work; I have seen some revolvers that failed to function after such springs were installed.
Jim
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