I've got a bunch of 39 and 59 series pistols. (30-2, 639, 3904, 59, 659 and 5906.)
With too much time on my hands being in the house, I'm wondering if I lighten the hammer springs on all these guns to ???? can I drop the trigger weight by a pound + or -?

And can I order the same spring for 5 of the six guns. (I'd leave the 39-2 alone, it's damn near perfect as is.) Or would it be different for each gun or the 39s and 59s?

And what weight would be suggested?

Or should I just go out to the garage and clean the winter's **** from in front of the reloading stand and make some bullets?

All of the pistols you listed use the same hammer spring.

Standard is 20 lb.

Wolff sells hammer springs in weights of 16 to 23 lb.

Reducing hammer spring weight will reduce double action trigger pull weight.

It can also result in misfires from insufficient primer impact.

It can also contribute to increased slide and frame wear because the hammer spring (along with the recoil spring) slows the movement of the slide.

This can be offset by going to a heavier recoil spring, but that can take some experimentation.

For reliability, it's best to keep things stock, but they're your pistols so... enjoy!

John

In several of my 3rd Gens I've put reduced weight mainsprings/hammer springs in them. They are range guns & I've never had any issues with light strikes on mine. I'm not saying you can't/won't, just that I haven't.

Obviously other factors can come into play & later when the spring gets old & tired it'll weaken, so...

Going down 2-3# on mainspring will generally net you a 1# lighter SA trigger. I've never gone lower than a 17# M/S.

I can't quote you a DA pull reading cause my trigger gauge doesn't go that high but you should feel a difference.

If you shoot light loads, like in the W-W white box ammo, I doubt you'll need to make any adjustments to the recoil spring, provided it's new.

If you shoot full/+P loads then going up two pounds on the recoil spring will likely offset the mainsprings difference & suffice.

There's not a 1-1 ratio between them but it's a place to start.

A before & after comparison test would be helpful.

.

__________________
Waiting for the break of day