Lightening trigger pull on 3913 and 4013

[4013]

I recently replaced the trigger return springs and hammer springs on these two pistols. For the hammer springs, I used the 17# springs from Wolff. I tested both pistols with the new springs, and they both fired a variety of ammo reliably.

However, the new springs actually made the double action pull heavier than the orginal factory springs.

Now I have ordered another 1/2 dozen 17# hammer springs and intend to cut off 1/2 coil at a time until I fine the spring with the lightest double action pull that will dependably fire a variety of ammo.

If any one has any experience doing this on these pistols, I would appreciate any advice.

Thanks.

 

[icemn]

My experience was similar to yours. I then cut 2 coils off of the 17 lb Wolff hammer spring and it dropped my DA pull to just over 7 lbs and my SA pull to just over 5 lbs.. That was a gain from factory of a little over 2 lbs DA and 1 lb SA. I did not replace the recoil spring and am very pleased with the results so far.

 

[4013]

Thanks very much for the info.

 

[6actual]

For the hammer springs, does anyone know what the stock weight is?

 

[icemn]

20 lbs, according to Wolff.

 

[handgunner356]

Are you sure you got the short hammer spring? They use either a long for full size or short for compacts. I've used the 17# in a number of guns and they have always lighten the trigger pull. I would be leery of cutting any coils out of the hammer spring myself. I usually replace the recoil spring with a stock weight or heavier if using +P loads as the lighter hammer spring will have less effect on slowing the slide.

 

[KingArthur]

Are you sure you got the short hammer spring? They use either a long for full size or short for compacts. I've used the 17# in a number of guns and they have always lighten the trigger pull. I would be leery of cutting any coils out of the hammer spring myself. I usually replace the recoil spring with a stock weight or heavier if using +P loads as the lighter hammer spring will have less effect on slowing the slide.

I put a 4013TSW (3.5" barrel on lay-a-way at a pawnshop. I came across this thread and was wondering how can I tell if it would have a long or short spring? Would the 16# spring be too light?

EDIT: I scrolled down a little and saw the 4013 model has the short spring. But how do I find out which spring mine would have. The listing says some models may have the 17# spring in already and the 17 in the lowest they have.

 

[firescout]

One of the best things I did for the trigger pull on my 908 was to polish the heck out of all the friction points on the internal parts. Everywhere there was a friction rub mark got burnished with a felt wheel and rouge polish. The sear/hammer notch points got a light clean-up with a fine stone. I also installed a lighter Wolff mainspring.

 

[10xatten]

Most Smith autos are not target guns, and personally, I prefer a heavier trigger for safety purposes. Play with the trigger on your revolvers. Actually, I performed the Iowegan tune up on my bedside SpeedSix, and am afraid the D/A trigger pull may be too light for home defence purposes.

Stay safe
Richard

 

[BLUEDOT37]

Wolff RP Hammer Spring

I recently replaced the trigger return springs and hammer springs on these two pistols. For the hammer springs, I used the 17# springs from Wolff. I tested both pistols with the new springs, and they both fired a variety of ammo reliably.

However, the new springs actually made the double action pull heavier than the orginal factory springs.

Now I have ordered another 1/2 dozen 17# hammer springs and intend to cut off 1/2 coil at a time until I fine the spring with the lightest double action pull that will dependably fire a variety of ammo.

If any one has any experience doing this on these pistols, I would appreciate any advice.

Thanks.

I bought Wolff's reduced hammer spring (short) pak, #26582, for my 4516 (essentially the same as the 4013) & installed the 17# spring & it felt a little lighter than the one that was in it & has functioned reliably so far. Coincidentally, I bought a 4013 this weekend & will trying one of the other light springs in it too.