GP100 Spring weights

C

Chris Cullen

New member
I am quite sure that this may have been posted before, but I'm new here so I have an excuse :)

I have a Ruger GP100 with a very heavy trigger pull, being that it was a former security officer issue. I'm guessing that its about 8 kilos (I think thats over 17 pounds equivilent??)

I managed to find some new springs for the for the hammer, but I am confused as to the descriptions given to each of the three springs. The springs are produced by Wilson's Combat and are numbered #9, #10 and #12.

Can anyone give me an indication of the exact weight ratings in reference to these numbers?

Chris Cullen
 
I recently acquired a GP100.

I have not taken mine apart yet but I was looking at the parts diagram in the users manual.

It looks like the Ruger operates similar to the S&W in that there is a trigger return spring and a hammer spring.

Both springs affect the weight of the trigger to your finger. The rest of the weight to your finger is in the mechanical action itself.

In my S&W's I went to a lighter trigger return spring and I used something called moly lube to smooth up the parts. You can really slick up the parts with the moly, it smooths everything out and reduces the mechanical resistance.

The potential problem with going to a too light trigger return spring is that the reset will get slower. The problem with going to a too light hammer spring is that you might not get ignition because of a light strike on the primer.

The springs you are looking at refer to weights of the springs. 10# is ten pounds, etc. There is a wolff spring kit that will give you all of those springs for a few dollars. Then you can experiment with what works for you.

I would suggest you work with smoothing it out and trying different trigger return springs before you change out the hammer spring.

Let us know what you end up doing. I am going to change out my trigger return one of these days too.
 
If I recall from the Wolff Spring site the stock Ruger GP mainspring is 14 lbs. and trigger return spring 12 pounds. The replacement mainsprings are 9, 10, 12 lbs. and trigger return springs (at least in the Wolff kit) are 8 and 10 pounds. Out of the box my GP experience is that the double action pull will be about 13 to 15 pounds and may go down a bit with usage due to the parts wearing in (maybe 1-2 pounds). If no action tuning is done (polishing judiciously the correct surfaces) try the 10 pound mainspring and trigger return spring. With polishing of the correct surfaces the 8 pound trigger return spring MIGHT briskly return the trigger and may not. The 9 pound mainspring may have failure to fires.

With tuning the GP can use the 8 pound trigger return spring and 9 pound mainspring. On mine this gives a single action pull of 2.75 pounds and 7.75 pound double action pull as measured on a Chatillon recording gauge. What will work depends on tuning and tolerances such as firing pin protrusion, headspace and endshake.
 
I agree with bigboar,but the D/A pull after the springs and polishing should be even better.Mine is a lil over 3lbs in d/a according to my smith.I also went with the lightest springs and havent had a missfire yet.
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I just order the Wolff kit for this gun, and I have a newbie question. What does Ruger call the trigger return spring? The exploded diagram does not use this term, and there are a whole bunch of different springs.

~Ichiro
 
Not sure what the term is but if you wanna know what spring it is.its the one that works the plunger to take the trigger group out of the frame.
 
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