SP-101 trigger job.?

[Bustedglockv2]

I have already mirror polished all of my internals in my sp101 which smoothed up the trigger a ton..... However I want to make it a tad more crisp And lighter....what else can I do minus a lower powered hammer spring? I've been fine tuning triggers on auto smiths, 1911s and haha glocks for years but I'm new to revolvers. Don't wanna make it go nuclear

 

[contender]

Welcome to the Forum!


Lube the internals & shoot the snot out of it!

 

[Thel]

Several things. You can install shims on the trigger, hammer and hammer dog pivot pins to take out some of the slop in the action ( http://www.triggershims.com/rsa_shims.html ). A reduced power trigger return spring can be used (Wolff 8 lb., stock is 10 lbs). The mainspring is way over powered at 14 lbs. I would reduce this to a 12 lb. In my SP101 that is tuned I have run the 8 lb trigger return and 9 lb mainspring with no misfires but currently run a 10 lb as a little insurance. Depending upon tolerances the lower powered mainsprings may or may not work in all SP's. Also, a hammer can be lightened which will allow lower powered mainsprings. Other things can be done, also, to allow a lighter mainspring

 

[Jimbo357mag]

The mainspring and trigger return spring on the SP-101 is way heavier than it needs to be for proper function on a gun that has a smooth action. Ruger of course uses that heavy spring to overcome any problems with the factory assembly. I would suggest you get the wolf spring pack and reduce the trigger return spring and the mainspring and see how it feels to you. This will indeed improve your trigger pull considerably. I found that by going to the next lighter springs my trigger pull was improved and primer ignition was not effected. If you care to explore you can use lighter springs until you get some mis-fires and then you know you have gone too far.

Here is a complete guide to slicking-up an SP. I make no claims about the article. I just found it on the interweb.

http://www.sp101trigger.com/index.html

 

[Thel]

To add to what Jimbo357 says my SP when stock had a double action pull of 14 lbs. After the tune and with the 8 lb trigger return and 9 lb mainspring the double action was 8.4 lbs approx as measured by a Chatillon trigger pull gauge. With the 10 lb mainspring substituted the double action is 9 lbs. This is better than what I could get out of a small frame Colt Magnum Carry I had.

 

[Bustedglockv2]

It has a pretty sweet trigger, my thumbs just getting sore from single action haha I think I'll start with ther hammer spring and trigger spring and see Where she goes

 

[GP100man]

If thinkin of "crisping" the SA take it to a smith that has the jig & correct stones , the angles on the SA sears are critical & must be maintained.

 

[RoninPA]

Tuning triggers on semi autos (or rifles) is COMPLETELY different than doing a "tune up" on a revolver. You can polish the surface of the trigger and hammer on a revolver to get a nice crisp release but unless you mess with the sear and notches on a revolver you don't really lighten the trigger. I DO NOT recommed doing this as you can easily make your revolver unsafe.

You really have to remember that a SA or DA revolver works a bit differently that a semi auto. In a DA revolver the hammer (main) spring is the main device that affects the trigger pull (the trigger return spring also affects the pull that's why many change both at the same time). You can change the spring to get a lighter pull, but you have to be aware that if you go too light on the main spring you can have ignition problems. Typical DA revolvers out of the box have a pretty heavy trigger pull in the DA mode and it's pretty easy to lighten in up and still get good ignition. Smoothing the bearing surfaces of the trigger and hammer will also make it seem that the trigger is lighter.