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Thread: Ouch--I 've bruised my trigger finger. Ruger Sp101 trigger job ideas.

  1. #1
    Boolit Master
    rintinglen's Avatar
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    Ouch--I 've bruised my trigger finger. Ruger Sp101 trigger job ideas.

    It took me a while but Last November, I finally got the 327 SP101 I'd been hankering for. What with the holidays, work and (boy do we need it) rain, I have not been able to give it a good work out. Well Sunday I finally managed to do so. I ran about 125 rounds down range, double-action, and that trigger pull has to be fixed. I mean really.
    It goes way over my old Lyman trigger pull gauge and I know it can be better.
    So fellas, what have you guys done that has helped smooth and lighten your trigger pulls to make your pet SP101's more user friendly?
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  2. #2
    Boolit Bub hhilljr's Avatar
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    I have the 4.2" version of this revolver, and can attest to the very heavy trigger pull. I purchased the Wolff replacement spring kit, which has three hammer springs and one trigger spring. After installing the heaviest of the hammer springs, which I think was labeled 19#, and replacing the trigger spring, the single action pull is about 3.75 pounds. The double action still exceeds my RCBS pull gauge, but it is much better. Cocking the hammer single action is noticeably easier. I went with that weight hammer spring to ensure it fires every time. If it proves reliable that way, I might drop down to the next lighter spring. I'm trying to lighten the DA pull, the SA is fine now and I'd like no lighter.
    Montani Semper Liberi

  3. #3
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    Kraschenbirn's Avatar
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    Wolfe Spring Kit and a bit of careful polishing here and there got the job done for me. Haven't gauged the pull but it feels (to me) about the same as the wife's early-70s Diamondback.


    Bill
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  4. #4
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    Wolf kit in my gun and it's 3# single and 9# double. Easy to install.

  5. #5
    Boolit Master huntrick64's Avatar
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    I would encourage you to buy Gary Bunker's IBOK (Iowegan Book of Knowledge) for the SP101 / GP100. Follow his instructions and you will be amazed at the results. I have done this on several GP100s and my stainless 357 sp101. It will do far more than shoot better, it will also disassemble easier. Not real sure where to buy them now, I bought mine directly from Gary. He goes under the handle of IOWEGAN on the ruger site. You might as well buy his other books while you are there. Single-Six, Black Hawks, etc. Cost is minimal, gain is huge.

  6. #6
    Boolit Master
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    I can't imagine how much easier the SP101 could be to disassemble. An idiot could do it in about five minutes. There are free Youtube videos showing how to do it also. Nothing against Gary Bunker, but you don't need a book to take the gun apart. It's probably the easiest to take apart revolver I've ever owned.

  7. #7
    Boolit Master
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    I used a guide I found on google and a set of springs. Mine felt like it had sand in it when I first got mine. Now its really nice.

  8. #8
    I ordered a wolf spring kit and houge grips three weeks before I bought my 3 inch 101. When I got the gun home I changed springs and grip. Never shot it "as is".

  9. #9
    Boolit Master
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    Got a 4.2" SP-101 327 at the end of last year. Yet another happy Wolff customer.

    17113 RUGER SP-101 RP REVOLVER SHOOTER'S PAK

    Just type the number above into the RAPID ORDER ENTRY box, put 1 in for quantiy and drastic improvement will be on its way.

    https://www.gunsprings.com/index.php

  10. #10
    Boolit Master Boogieman's Avatar
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    Picked up a new SP101 2 weeks ago, trigger pull was smooth but heavy, put in a Wilson Combat 10 lb. hammer spring & trigger return spring. polished the hammer strut, SA & DA pulls much lighter & it still sets off every brand primer I've tried. Search Ruger SP101 trigger job guide for complete instructions.
    The 3 people a man must be able to trust completely are his gunsmith his doctor & his preacher ..,his gunsmith for his short term health ,his doctor for long term health ,and his preacher incase one of the others mess up.

  11. #11
    Boolit Master FergusonTO35's Avatar
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    I had a 3" SP .357 for awhile. Sturdy little gun with good accuracy but had the worst trigger pull of any firearm I have ever owned, even worse than the zinc cheapies. When I bought a 1967 S&W 10-5 and found out what a good double action pull is like the SP lost it's attraction. Traded it for th same price I paid for it on a really nice 1979 Marlin 1895, a very good decision!!
    Currently casting and loading: .32 Auto, .380 Auto, .38 Special, 9X19, .357 Magnum, .257 Roberts, .30 WCF, .45-70 Gov't.

  12. #12
    Boolit Master gnostic's Avatar
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    Wolf springs will no doubt improve the trigger pull on a target gun. Notice, Wolf Springs tells you, not to lower the weight of hammer springs, if the gun's to be used as duty, or self defence weapon.

    Whenever I mess with the springs, I begin getting an occasional light hammer strike, particularly when shooting double action.

  13. #13
    Boolit Master OptimusPanda's Avatar
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    I used to have one of the 4" .357mag sp101s. The double action must have been nearly 20 pounds (or it felt that way). From the get go it was just a range toy so it was mostly a non issue as I rarely fired it double action.
    It's only hubris if I'm wrong.

  14. #14
    Boolit Master
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    Please please keep in mind the 327 Federal uses small rifle primers that take a harder blow than small pistol primers! You will never get a 327 gun to go as lite as a 357/38 gun with factory ammo because of this. I found this from first hand experience. I've learned to stage my shots with both the SP101 and GP100 with a heavy trigger and it works for me.

    You can't use your experiences with 357s to extrapolate onto the 327 guns. Apples to oranges in a sense!

  15. #15
    Boolit Master
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    Quote Originally Posted by Thundarstick View Post
    Please please keep in mind the 327 Federal uses small rifle primers that take a harder blow than small pistol primers! You will never get a 327 gun to go as lite as a 357/38 gun with factory ammo because of this. I found this from first hand experience. I've learned to stage my shots with both the SP101 and GP100 with a heavy trigger and it works for me.

    You can't use your experiences with 357s to extrapolate onto the 327 guns. Apples to oranges in a sense!
    Not completely true. I use SRP in my .357mag loads. They all work in my gun and the springs have been lightened. You'd need to try a couple primed cases in your gun to see if they'll work or not. I've been using SRP for several years now....since the primer "shortage" struck for about the third time a couple of years ago. So far, no problems with using them. I only recently tried some SPP in the same loads and so far, no difference in POI with the change in this gun with the same loads only changing primers. Anyway, it's a pretty simple test to see what your gun will do with them.

  16. #16
    Boolit Master
    rintinglen's Avatar
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    I have ordered a set of Wolfe springs from Midway, and a set of shims from Shively Sales. I'll pull this thing apart, do some polishing and try some lighter springs.
    _________________________________________________It's not that I can't spell: it is that I can't type.

  17. #17
    Boolit Master
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    I have two of the SP-101's and have used Wolfe springs in both of them. The lightest of the 3 hammer springs would not reliably ignite the primers in either gun. 2% to 5% would fail to fire. I switched to the middle spring and it was reliable in both of them. On one of the GP-100's I have, I had to go to the heaviest Wolfe spring to get reliable ignition. Even then, the trigger pull was lighter than the factory spring. The others settled for the middle spring. Start light and let your gun tell you what it needs.

  18. #18
    Boolit Master
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    Quote Originally Posted by Thundarstick View Post
    Please please keep in mind the 327 Federal uses small rifle primers that take a harder blow than small pistol primers! You will never get a 327 gun to go as lite as a 357/38 gun with factory ammo because of this. I found this from first hand experience. I've learned to stage my shots with both the SP101 and GP100 with a heavy trigger and it works for me.

    You can't use your experiences with 357s to extrapolate onto the 327 guns. Apples to oranges in a sense!
    The number of factory 327's I'll be shooting approaches zero. I have loaded about 1400 rounds so far, though not all have made it down the barrel. I have 2 Single Sevens and this 4.2 inch SP101. I don't own a single small rifle primer. I have been using CCI regular pistol and Winchester Small Magnum pistol primers.
    Remington and Winchester standard Small Pistol Primers will be pierced about 1/6th of the time.
    _________________________________________________It's not that I can't spell: it is that I can't type.

  19. #19
    Boolit Master
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    It's true that if you reload you can go low for the hammer and get away with it. My wife's Taurus snub nose is an example. I gave it the Wolfe spring treatment and it only eats H&R mags with SP primers. Factory 327 Federal ammo is very unreliable with this setup, but she can shoot it!

  20. #20
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    I have found that you really need the heavier factory strength springs to overcome the rough surfaces ... once the inside has been smoothed up ... then lighter springs work ... I have the "middle" set of springs in my 3 1/16" SP101 357 now ...
    Shawn


    John 3: 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check