1911 9mm recoil spring

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Post by swehrman on 1/29/2019, 10:01 am

I bought a used Les Baer 1911 in 9mm with a frame mount.  If I want to replace the recoil spring, what weight range should I look at getting.

-- Scott
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Post by cdrt on 1/29/2019, 10:49 am

Factory standard is a 14 pound spring.  I guess it depends on what load you will be using, if you need to go lighter or heavier.  I've been playing with a RO  in 9mm and so far, the factory spring seems to work okay with the lighter loads I have been trying.
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Post by David R on 1/29/2019, 1:41 pm

I have a Dan Wesson PM-9.  Its a full size 9mm.  Came stock with a 10 lb recoil spring and 18.5 lb main spring.  The firing pin stop is smaller radius than a colt.

It fires everything.  Slide seems slow compared to my 45s.

David
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Post by swehrman on 1/29/2019, 8:20 pm

I have a 14lb spring in my 45. The spring that is in the 9mm is definitely lighter than 14lbs. I've got a 10lb spring coming. 

-- Scott
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Post by Bigtrout on 1/30/2019, 12:30 pm

My RO9 had a stock 9 lb. r.s.   I worked up and down to 11 lbs using a Wolff kit.  If I start using subsonic loads I'll probably have to drop to a 10 or back to 9 for good function.  I'd recommend a Wolff kit of 6 r.s.'s 8 to 13 lbs. firing 10 rounds with each.
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Post by Allgoodhits on 1/30/2019, 2:17 pm

As has been stated, there is a range of likely acceptable recoil spring weights depending on what loads you will be using.

I will add some things not yet addressed.

Too heavy a spring and felt recoil is greater, and the gun may not cycle. If you ever intend to shoot the gun weak hand only, make sure you test spring weight chosen with that load in that manner and use a full magazine. A two hand held gun and a firmly held gun may cycle just fine, but when held with weak hand only, it may not be as reliable. The symptom most often here is failure of slide movement enough to properly extract, eject and pick up the next round from a full magazine.

Too light a spring is harder on the gun, unless other actions are not taken to compensate for the low weight recoil spring. Some will use a heaver hammer spring, or a different cut on bottom of slide stop to reduce the slide speed, when using a too light recoil spring for the load.

Just more to think about/consider.
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