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  #1  
Old 09-08-2008, 11:11 AM
Keith DW Keith DW is offline
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Factory spring weights

Please make this a sticky.

All Wolff springs

Full sized .45 18.5 lb
Full sized 10mm 20.0 lb
Full sized .40 S&W 16.0 lb
Full sized 9mm 10.0 lb

Commander .45 20.0 lb
Commander 10mm 22.0 lb
Commander 9mm 12.0 lb

These are all standard springs. No variable springs.

Full sized mainsprings 18.5 lb

Bobtail mainsprings 23 lb

Firing pin springs
Extra power or Extra, Extra power

Last edited by Keith DW; 06-09-2010 at 10:08 PM.
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  #2  
Old 09-08-2008, 12:42 PM
DWCoyote DWCoyote is offline
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Thanks Keith!

I second the nomination to make this a sticky. How many times has this info been asked for (me included)?
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  #3  
Old 09-08-2008, 08:01 PM
RightToCarry RightToCarry is offline
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Here is a link to the Wolff website....note what they call out as "factory standard" (16lbs)
http://www.gunsprings.com/SemiAuto/C...ml#Colt%201911
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  #4  
Old 09-08-2008, 08:13 PM
fugedaboudit fugedaboudit is offline
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Thanks Keith
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  #5  
Old 09-08-2008, 08:47 PM
Keith DW Keith DW is offline
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OK...Our Factory spring weights...
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  #6  
Old 09-08-2008, 09:17 PM
DWCollector DWCollector is offline
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You rock.
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  #7  
Old 09-08-2008, 09:22 PM
Dave Severns Dave Severns is offline
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Perhaps we'd better call this "Current Factory DW Spring Weights, as there has been a fair amount of change in spring weights since about 2002 or so.
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  #8  
Old 09-08-2008, 09:29 PM
fugedaboudit fugedaboudit is offline
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The Colt factory recoil spring weight is 18lbs for a Commander. If one never shot any +P stuff would the 18lb spring offer any advantages?

Keith, could you also specify the recommended spring replacement intervals?
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Last edited by fugedaboudit; 09-08-2008 at 09:39 PM.
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  #9  
Old 09-09-2008, 07:13 AM
Keith DW Keith DW is offline
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You are right Dave. Spring weights have been fairly consistent since 2005.

Follow Wolff's recommendations on spring change intervals. If you are shooting a lot of high power loads, change your recoil spring more often. Also change the commanders more often than their full size counterparts.
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  #10  
Old 09-10-2008, 09:46 PM
Keith DW Keith DW is offline
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ttt
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  #11  
Old 09-11-2008, 08:04 AM
nickE10mm nickE10mm is offline
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Nice!

Thanks for that info! VERY nice to know!!
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  #12  
Old 10-12-2008, 11:03 AM
Dave Severns Dave Severns is offline
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NOTE: Many shooters find the factory mainspring weights in their CBOB are inadequate for reliable ignition. I personally recommend using only the Wolff 23# sping in the CBOB platform carry pistol. Same goes for the CCO pistol, when used for carry.
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  #13  
Old 11-30-2008, 10:03 AM
fugedaboudit fugedaboudit is offline
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Quote:
Originally Posted by Dave Severns View Post
NOTE: Many shooters find the factory mainspring weights in their CBOB are inadequate for reliable ignition. I personally recommend using only the Wolff 23# sping in the CBOB platform carry pistol. Same goes for the CCO pistol, when used for carry.
I have a Wilson 21lb mainspring in my CBOB with no problems with ignition. It makes a nice big, deep dent in primers. I believe my EGW oversized ".073" FP has a lot to do with the reliable ignition.

I'm no gunsmith, but I think the ignition problem in some CBOB's could be related to the anorexic firing pin combined with powder build up in the pin hole/FP tunnel. Browning designed the 1911 with a .090" firing pin, and DW and other builders use pins sized for the physically smaller primer of a 9mm/38 super. I believe the core issue of most ignition problems in a CBOB is the pin size DW uses does not sufficient mass/weight to light the primer, which is larger than the pin size was created for. A heavier spring may be more of a bandaid than a solution.

I think some people may need to ream the FP hole and put in a larger/heavier FP more appropriate for a .45 size primer to really address this issue correctly.
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Last edited by fugedaboudit; 11-30-2008 at 10:09 AM.
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  #14  
Old 08-12-2009, 05:05 PM
Ripped4rce Ripped4rce is offline
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Great info

This is great reference material.
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  #15  
Old 10-07-2009, 11:19 AM
r32bjj r32bjj is offline
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Firing pin - DW Bobtail

Can I use regular 1911 firepins on the DW Bobtail Commander? I am looking into iinstaling the Wilson bullet proof firing pin.
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  #16  
Old 11-20-2009, 10:49 PM
DW Steve DW Steve is offline
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I just ordered a Wilson 22# spring with a set of shok-buff's. I know the list says 20# for a full sized 10mm (I have a RZ-10). Any issues with this spring setup?
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  #17  
Old 01-17-2010, 01:33 PM
brzusa.1911 brzusa.1911 is online now
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I believe the shock buffs are to be used when you are running lighter springs (#13, 14, 15, 16), not stronger.
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  #18  
Old 01-24-2010, 02:11 PM
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Looking to keep this thread complete, What Mainspring is used in the CCO?

Thanks!
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  #19  
Old 01-24-2010, 07:50 PM
Dave Severns Dave Severns is offline
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23# Officer's Model spring.
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  #20  
Old 01-24-2010, 09:28 PM
DW Steve DW Steve is offline
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Quote:
Originally Posted by DW Steve View Post
I just ordered a Wilson 22# spring with a set of shok-buff's. I know the list says 20# for a full sized 10mm (I have a RZ-10). Any issues with this spring setup?
Just as a follow up to this post several month ago, I have been running the 22# w/ Shok-Buff's since I posted this and it runs with out a hiccup. I liked it so much that my new '09 Razorback 10mm has the same springs & shok buff's. Works great and I've had not FTF in either of these since. Highly recommended.
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  #21  
Old 01-25-2010, 10:49 AM
Star4Ever Star4Ever is offline
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Question on springs:

Is there any relationship between the spring wire diameter and the pound rating of the spring itself?

I ordered back about 10 years ago a nice Wilson spring kit that came in a blue roll up bag that had a variety of springs included. I noticed that when i mic'ed the springs the pound rating was related to the wire diameter. The higher the poundage rating the larger the wire diameter.

Now this observation is limited only to that kit. But then, can we somehow extrapolate a measured wire diameter of a "unknown" spring and then "estimate" its poundage rating? I suspect we can.

Your thoughts on this?

I measured the "standard" springs in my kit and here are the results:

8# = .0380
10# = .0395
11# = .0405
12# = .0425
17# = .0450
18.5# = .0455

Now some oddball springs in my kit ....

10# = .0355 this is a SPARCO Progressive Spring with tight winds near the base and looser near the tip
14# = .0420 this is a SPARCO Progressive Spring with tight winds near the base and looser near the tip

lastly... a spare original Dan Wesson Pointman - Major spring measuring .0435 so I recon it to be about 13#
based on the standard springs above.
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Last edited by Star4Ever; 01-25-2010 at 02:50 PM. Reason: added spring data
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  #22  
Old 01-26-2010, 04:49 AM
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wire diameter can be an indication of spring weight, but it assumes a lot of facts not in evidence. You need to know what specific alloy the spring is made from, any heat treating used, lots of little things that all add up.

To measure a springs weight, you could use a scale. Simplistically, stand the spring on a bathroom scale, then press down until it's fully compressed. Look at scale and see what it says. Or if it's a constant rate spring, compress it 1 inch, see how much it takes, then multiply by the length in inches of the spring.
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  #23  
Old 02-22-2010, 05:40 PM
yogibearal yogibearal is offline
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I guess these factory spring weights are just for the recoil springs?

What about the hammer spring in the MSH?

What does changing each do to the characteristic of the pistol?

I've read that some combinations tends to
- reduced felt recoil
- Easier to rack the slide

So the addition of MSH spring weight to this thread would be greatly appreciated.



-Thanks,

AL
Fall City, WA
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  #24  
Old 03-23-2010, 03:21 PM
mer mer is offline
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Quote:
Originally Posted by yogibearal View Post
What about the hammer spring in the MSH?

What does changing each do to the characteristic of the pistol?

I've read that some combinations tends to
- reduced felt recoil
- Easier to rack the slide

So the addition of MSH spring weight to this thread would be greatly appreciated.



-Thanks,

AL
Fall City, WA
It's there. Look for the lines that say:
Full sized mainsprings 18.5 lb

Bobtail mainsprings 23 lb
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  #25  
Old 03-24-2010, 06:38 AM
mer mer is offline
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Changing recoil spring weight and mainspring weight also affect the overall timing of the gun: the recoil spring primary function is to push the slide forward, it also absorbs energy as the slide goes back which affects the rearward velocity of the slide which affects how the spent cartridge is ejected (faster slide usually results in a longer toss of the empty). As the slide move rearward it cocks the hammer, cocking the hammer compresses the mainspring. A stronger mainspring absorbs more of the energy of the slide, leaving less that has to be absorbed by the shooter. Go back to the recoil spring now, a stronger spring drives the slide forward faster, but the magazine is lifting the top round into position so if it goes too fast, you can run into feeding issues because the essential timing is changed. Stripping the top round makes it hit the feed ramp, pop up and bounce off the top of the chamber, then finally tip over into alignment before the breech slams it home. All these things wind up soaking up more energy because when the slide stops moving forward, it has to transfer energy to the frame (through the barrel lugs on top and the bottom lugs to the slide stop).

Exactly what the heck does all this mean? I don't know, but summarized could be:
Yes, mucking about with spring weights can change the felt recoil in both good and bad ways and can make it easier to rack the slide.

I think the mainspring has a greater effect on the effort needed to rack the slide, but the downside is too light and you may suffer ignition problems. Heavier, one can always thumb cock the hammer which takes it out of the equation.

My personal mucking around I've settled on basically the original specs for a Government sized 1911 in 45 ACP shooting 200-230gr: recoil spring in the 16-18lb range, mainspring of 20lb, a FPS with a reduced radius bottom corner. This combination seems to work reliably for me, feels good enough when shooting, extracts and ejects just fine.
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