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  #1  
Old 03-27-2019, 1:20 PM
AlHO1966 AlHO1966 is offline
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Default 1911 9mm Mainspring and recoil spring

Running a SA 1911 9mm Loaded. Ever since getting rid of the ILS ive had tons of jamming issues. I have been running the stock 9lb recoil spring and a 23lb mainspring.

I think the 9lb recoil spring was worn out, pistol has probably around 1500 rounds through it.

Wolff states 14lb recoil spring is standard for 9mm 1911 but that is way more than the SA stock 9lb. I bought an 11 lbs variable power and the wolff recommended conventional 14lb. Going to put the 11lbs in the gun and see how it runs.

Im wondering what the 1911 gunsmiths on this site recommend and what is working for everyone else. It seems like most guys on the internet think the 23lbs mainspring is too much for gun but im seeing weights all over the place for recoil springs to mainsprings in this gun.

I run the gun in single stack but dont load my own ammo usually shoot 115gr but would like the most reliable set up, going for reliability as I will be switching to a .45 to shoot major soon.
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Old 03-27-2019, 5:00 PM
rdtompki rdtompki is offline
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That 23 lb. mainspring seems way too much. Granted, we run our SA 9mm 1911s with soft ammo for steel challenge, but I'd step down from that 23 lbs. FWIW, we use 9 lb. recoil springs which I thought was actually the factory spring.
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Old 03-27-2019, 5:20 PM
AlHO1966 AlHO1966 is offline
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Quote:
Originally Posted by rdtompki View Post
That 23 lb. mainspring seems way too much. Granted, we run our SA 9mm 1911s with soft ammo for steel challenge, but I'd step down from that 23 lbs. FWIW, we use 9 lb. recoil springs which I thought was actually the factory spring.
Thanks for the reply what mainspring are you guys runnung? 9lb is the SA factory recoil spring with ILS, Im not sure if its different in their non-ils guns. Wolff I believe goes by the Colt standard which is 14 lbs.
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Old 03-27-2019, 5:27 PM
rdtompki rdtompki is offline
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We run 19 lbs; I haven't looked at chrono data recently, but we're well south of 125 PF, at least my wife's load. Buy a few different mainsprings, 21, 20 and 19 and see what works best.

You didn't say what type of reliability issues you were having, but if they are ejection related then you definitely want to go lower on the mainspring "weight"
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Old 03-27-2019, 5:35 PM
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cindynles cindynles is offline
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I run a 19 lbs mainspring and a 10 lbs recoil spring. Works great in 9mm SA with 130 PF USPSA loads (135gr over 3.8gr of W231). I change the recoil spring ever 3,000 rounds and the mainspring every 15,000.
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Old 03-27-2019, 5:56 PM
AlHO1966 AlHO1966 is offline
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Quote:
Originally Posted by rdtompki View Post
We run 19 lbs; I haven't looked at chrono data recently, but we're well south of 125 PF, at least my wife's load. Buy a few different mainsprings, 21, 20 and 19 and see what works best.

You didn't say what type of reliability issues you were having, but if they are ejection related then you definitely want to go lower on the mainspring "weight"
I believe they are ejection related... Im having an issue where the gun is not cycling properly then becomes very hard to eject the round. I literally have to grab the slide with my left hand and strike the grip with my right hand to clear the round. Extractor is tuned properly and it happens no matter what kind of ammo.

Just purchased a 19 and 17 lb mainspring along with heavy duty firing pin spring from ed brown. So maybe those along with a new recoil spring will fix my issues.
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Old 03-27-2019, 6:39 PM
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DueceMcGurk DueceMcGurk is offline
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1911 FS 9mm: 10# recoil, 18# main, 125 PF.
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Old 03-27-2019, 6:49 PM
mtenenhaus mtenenhaus is offline
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I use an 11 lb recoil spring and an 18 lb mainspring with excellent reliability albeit it in a well polished and fitted format
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Old 03-28-2019, 3:20 PM
red1cz red1cz is offline
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Ditto on the 11/18 ~132-135pf
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Old 03-28-2019, 7:16 PM
dummykid dummykid is offline
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Here is my setup,
10 lb recoil + 17 lb main, 1911 9mm full size.
9lb recoil + 17 lb main, 1911 9mm + red dot cut. full size.

both guns have no issue to shoot
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Old 04-02-2019, 7:43 AM
alland alland is offline
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I run a 10 lb recoil spring with a 19 lb mainspring in my Springfield Range Officer.
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Old 04-02-2019, 8:41 AM
Sailormilan2 Sailormilan2 is offline
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Currently running a 25# MS with a 10# RS in one, and a 23# MS with a 12# RS in the other. As long as I use loads approaching standard power I'm fine.
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Old 04-04-2019, 8:19 AM
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I run 15# ms in my 1911 and 2011`s. My personal tuning experience shows that there's no need to go above 17# to reliably ignite hard primers like Tula. If it's breech lock time you're looking to increase then it's a more common practice to modify the fp stop. There's a balance thats has to be reached with these springs. Can't have too much on one end than the other. I'd give it a try and see what happens.
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Old 05-02-2019, 1:21 PM
Chief-7700 Chief-7700 is offline
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My wife's two Springfield 9mm run a 17# mainspring and 10# recoil spring. Shooting 147 grain bullet with a 135 PF.
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Old 05-02-2019, 2:52 PM
bruce381 bruce381 is offline
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Quote:
Originally Posted by AlHO1966 View Post
I believe they are ejection related... Im having an issue where the gun is not cycling properly then becomes very hard to eject the round. I literally have to grab the slide with my left hand and strike the grip with my right hand to clear the round. Extractor is tuned properly and it happens no matter what kind of ammo.

Just purchased a 19 and 17 lb mainspring along with heavy duty firing pin spring from ed brown. So maybe those along with a new recoil spring will fix my issues.
oil the slide, hood barell etc run a 1911 wet.
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