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AR15.COM
5/24/2009 6:40:30 PM EDT
I have over 800 rds through my Kimber Pro Tactical. I think I am supposed to change it now? so can I replace it with any recoil spring or does it have to be a Kimber 22lb spring? obviously I cant use a 14 lb spring but what can i use?
5/24/2009 8:24:04 PM EDT
[#1]
Wolff Improved XP Recoil Spring for .45 ACP




Wolff improved design recoil spring offers higher battery
pressure along with a higher recoil rating, providing optimal
functioning.




For all Pro Carry Series and Compact 4" Kimber guns only .45 ACP




Stock No. 32725....$ 7.89ea
 
5/24/2009 10:10:53 PM EDT
[#2]
Quoted:
Wolff Improved XP Recoil Spring for .45 ACP
Wolff improved design recoil spring offers higher batterypressure along with a higher recoil rating, providing optimalfunctioning.
For all Pro Carry Series and Compact 4" Kimber guns only .45 ACP
Stock No. 32725....$ 7.89ea  


I just put this set in my Pro Elite. I need to go shoot now.

5/25/2009 5:31:49 AM EDT
[#3]
so this is a higher pressure spring? why will this make the gun run better? I was thinking a lower pressure spring. school me please.
5/25/2009 7:11:59 AM EDT
[#4]
Quoted:
so this is a higher pressure spring? why will this make the gun run better? I was thinking a lower pressure spring. school me please.


A higher strength spring will absorb more of the recoil as well as provide a little better feeding.  It will definitely force the round into chamber much more reliably.

Obviously, this is to some extent.  A recoil spring that's too strong will cause cycling problems.  Also, if its too strong, it might screw up the timing of the extractor gripping the round and put too much strain on the extractor during feeding.

That should be a nice enough overview to give you the idea.

5/25/2009 4:27:42 PM EDT
[#5]
Quoted:
Quoted:
so this is a higher pressure spring? why will this make the gun run better? I was thinking a lower pressure spring. school me please.


A higher strength spring will absorb more of the recoil as well as provide a little better feeding.  It will definitely force the round into chamber much more reliably.

Obviously, this is to some extent.  A recoil spring that's too strong will cause cycling problems.  Also, if its too strong, it might screw up the timing of the extractor gripping the round and put too much strain on the extractor during feeding.

That should be a nice enough overview to give you the idea.


got it. basically don't screw too much with it.

5/25/2009 5:36:49 PM EDT
[#6]
Allow me to suggest you research ISMI silicon recoil springs before you buy a replacement. The specs on them are much, much better than the usual piano wire springs, IMO.

My .o2
5/25/2009 5:56:36 PM EDT
[#7]
Quoted:
Allow me to suggest you research ISMI silicon recoil springs before you buy a replacement. The specs on them are much, much better than the usual piano wire springs, IMO.

My .o2


i looked at those but they dont have a 22lb spring. strongest spring is 20lbs
5/25/2009 7:58:21 PM EDT
[#8]
Quoted:
Quoted:
Allow me to suggest you research ISMI silicon recoil springs before you buy a replacement. The specs on them are much, much better than the usual piano wire springs, IMO.

My .o2


i looked at those but they dont have a 22lb spring. strongest spring is 20lbs


Factually [with math], for the applications of a 1911 (and probably firearms in general), piano wire springs are generally better choices.  Assuming, of course, comparing quality springs from both sides.

Google should turn up plenty of info.  There's a thread on THR about this topic for those that don't want to do any calculations.
5/26/2009 1:42:07 PM EDT
[#9]
Quoted:

Factually [with math], for the applications of a 1911 (and probably firearms in general), piano wire springs are generally better choices.  Assuming, of course, comparing quality springs from both sides.



People whose opinion I respect tell me otherwise. I know in industrial uses, silicon springs have many advantages over normal wire springs. Why would guns be any different?    

5/26/2009 2:44:25 PM EDT
[#10]
Quoted:
Quoted:

Factually [with math], for the applications of a 1911 (and probably firearms in general), piano wire springs are generally better choices.  Assuming, of course, comparing quality springs from both sides.



People whose opinion I respect tell me otherwise. I know in industrial uses, silicon springs have many advantages over normal wire springs. Why would guns be any different?    



Because the steel-chrome-silicon springs used in those industries are of different width (cross-section/thickness) and at different operating temperatures?

Why do people assume you can directly compare two different applications?  Simply because steel-chrome-silicon springs are better suited to an engine block does not make them better suited for a 1911.

This thread is probably a good place to start if you have little/no knowledge of materials science of engineering: http://www.thehighroad.org/archive/index.php/t-44703.html

If you do, then just run a couple simulations or do the math –– it isn't particularly complicated to model.