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Discussion Starter · #1 ·
I have 3 recoil springs for my Series 70. Two of them don't seem to work well with my reloads and the third one works really well. The problem is that I do not know what the spring rating is for any of the springs. I assume that the one that works is a lower power, but , I have no way of knowing for sure.
I was thinking about ordering a wolff calibration spring kit, and was wondering which kit I should try first? And I see that they come with what I believe are firing pin springs? Or are they for the MSH?

The two springs that do not work well cause FTE's and stovepipes. Anyway, thanks for any insight!
 

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And I see that they come with what I believe are firing pin springs? Or are they for the MSH?
They're firing pin springs.

As to your other questions, someone else will have to answer those.
 

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What size 1911 ? What loads are you using ie powder / charge / bullet / crimp ? Does gun have a small radius firing pin stop ? Too many variables without more info . Standard weight springs for a 5" Gov't size 1911 in 45acp with open sights are 23lb mainspring , 16lb recoil spring . Yes the Wolff recoil springs come with a firing pin spring . Commander , Officers & other calibers use different rate springs .
 

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In order to accurately find spring poundage, please see page 907152 of your TTT gunsmithing catalog !
The spring testing kit is designed to easily aid you in determining the correct weight spring to use .
Simply insert spring into tester , jump ,and note the number on the
Super accurate side plate.

33EF11D9-7210-4FDE-B68B-74FC9CD709B3.jpeg

Send CASH and signed liability statement to your friends at TTT.
 

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I just talked to wolfe on the phone to replace springs that I have no idea what lb they are. Measure the OD, thickness of the wire with a mic and count the coils and he can tell you what lb it is.
 
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Discussion Starter · #6 ·
What size 1911 ? What loads are you using ie powder / charge / bullet / crimp ? Does gun have a small radius firing pin stop ? Too many variables without more info . Standard weight springs for a 5" Gov't size 1911 in 45acp with open sights are 23lb mainspring , 16lb recoil spring . Yes the Wolff recoil springs come with a firing pin spring . Commander , Officers & other calibers use different rate springs .
Govt Model, completely stock, don't know about the small radius FPS, using 200gr Falcon SWC lead bullet, 4gr Red Dot, no crimp. And thanks for the help! Well except for TAC45, he worries me.....LOL
 

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For a stock 5" Gov't model 23lb main or hammer spring & 16lb recoil spring are stock . Hammer spring you can go as low as 19lb without issue . Your load is pretty much a standard mid range target load & should function with stock springs . I would tighten your crimp to .369 taper crimp . Any local gun store / range / gun smith should have new springs in stock , might have to look a bit . If you mainly shoot target loads I'd also get & install a 19lb mainspring as it'll help functioning with lighter loads . A small radius firing pin stop is used for guns that will only shoot full power loads . It allows the gun to stay locked & slows rearward slide momentum . All this happens very quickly . Not needed or desired for target loads . A reduced power 19lb mainspring will not reduce guns ability to shoot full power loads either , felt recoil might be increased but not enough to worry about . The recoil spring does get compressed as slide moves to the rear , but it's real function is to return slide to battery . You generally want it to be strong enough to do so , for slide not to outrun mags ability to feed the next round & for slide to lock back on an empty magazine . If recoil spring is too strong it will cause all kinds of feed problems & jamming . If you'd like PM me & I'll send you my cell # & we can discuss this .
 

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For a stock 5" Gov't model 23lb main or hammer spring & 16lb recoil spring are stock...Your load is pretty much a standard mid range target load & should function with stock springs . I would tighten your crimp to .369 taper crimp...
Go to Brownells or Wolff and get a 23lb mainspring and 16lb recoil springs.

Then purchase an L.E.Wilson .45 case gauge

I would and do crimp .45 Auto to .470, not .369
 

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Discussion Starter · #12 ·
Thanks Walleye! Good info!
 

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Discussion Starter · #13 ·
Ordered a Wolff calibration spring kit for reduced power loads, as I shoot a fairly light load in my 1911. Will see how it functions, and at least I will know what pound springs I am using.
 

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Discussion Starter · #14 ·
Ok, got the spring kit, but there are 3 firing pin springs included that are supposed to be "extra power" FP springs. Is there a need for the extra power FP springs when using lighter recoil springs?
 

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Ok, got the spring kit, but there are 3 firing pin springs included that are supposed to be "extra power" FP springs. Is there a need for the extra power FP springs when using lighter recoil springs?
I've read the extra power firing pin springs lessen the risk of a slam fire when using heavier than standard recoil springs that cause the slide to return to battery more forcefully.
The extra power FP spring also resists an inertia fire if a gun with out a firing pin safety is dropped on it's muzzle, and
can mitigate the possibility of a loose fitting firing pin stop dropping down while firing.
Pedro.
 

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I'd just put a 16lb recoil spring and 23lb hammer spring in it and run it and see what happens. That way you have a known spring weight for a starting point and you can work out any issues from there.
 
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