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Old 02-12-2013, 16:49   #1
g29guy
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10 mm kimber 1911 help with springs.

I have recently purchased a Kimber Eclipse Custom II chambered in 10mm. After running a few mags through it I realized my reloads are too hot for the gun to cycle properly. Two spent cartridge jams in 3 mags.
I have a g29 with 23 and 21 lb springs it cycles great with the same round.

My question is what combination of spring weights with a New firing pin stop from EGW do yall recomend to run med to hot reloded ammo and what brands do you recommend.

So far Ive read to go with a 23 lb main spring (hammer spring) and a 20 lb recoil spring with the 90 degree firing pin stop small beveled edge. Does this sound close for 10mm? Theres alot of info on 1911's in 45 caliber but not alot for the 10 mm.

Thanks, and any extra info to help a new to 1911 10mm owner would be great. Im a very capable mechanic and machinist, just havent ever owned a 1911.
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Old 02-12-2013, 17:01   #2
Black Smoke Trail
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Have you tried a Sprinco recoil buffer spring or system?

http://www.sprinco.com/recoil.html

I installed the Sprinco Corbon recoild buffer system in my G20 and am very satisfied with it.
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Old 02-12-2013, 17:12   #3
g29guy
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I have never used the sprinco. sounds interesting. I would like to get the slide timed right with proper springs and fps first.
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Old 02-12-2013, 21:23   #4
nickE10mm
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Quote:
Originally Posted by g29guy View Post
...

So far Ive read to go with a 23 lb main spring (hammer spring) and a 20 lb recoil spring with the 90 degree firing pin stop small beveled edge. Does this sound close for 10mm? Theres alot of info on 1911's in 45 caliber but not alot for the 10 mm.
U GOT IT DEAD ON.... although the mainspring / hammer spring weight change is negotiable. You may have to try 19, 21, 23 or even 25lb mainspring until you find what's perfect ... But 23 is a good happy-medium if your trigger is still light and smooth.

In a 1911, it's the Firing Pin Stop geometry (flat bottomed) and mainspring that slows slide unlocking and controls timing rather than recoil spring. Leave that recoil spring at 20lbs and don't be tempted to make it heavier. It will just wear your barrel feet and lugs more than necessary.
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Old 02-12-2013, 21:57   #5
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Thanks nick. Ordering two fps tomorrow with springs. I may just order a spring kit and have some room to play with. 21,23,25.
Just wanted a good idea of where to start..

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Old 02-12-2013, 22:01   #6
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Quote:
Originally Posted by g29guy View Post
Thanks nick. Ordering two fps tomorrow with springs. I may just order a spring kit and have some room to play with. 21,23,25.
Just wanted a good idea of where to start..

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Yea no problem...

I can't remember what the typical stock mainspring is in a full sized 10mm 1911... But I'd bet 19 or 21 at most.

I tried a heavier mainspring in my old Razorback and it totally ruined my trigger pull ...so I put it back to stock. But that's not to say that a good trigger can't be had with a heavier spring here. That was just MY experience.
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