Nelson and Hammer Spring

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Nelson and Hammer Spring

Post by Tim:H11 on 9/6/2016, 3:16 pm

the Nelson is advertised as a conversion for a factory 1911. Will it function with a 30# ILS hammer spring? I'm wondering if I can throw it on top of my wad gun frame. SA RO.
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Re: Nelson and Hammer Spring

Post by jglenn21 on 9/6/2016, 3:30 pm

I think most folks run it with a std 19lb spring

The folks at Nelson would know. Great people
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Re: Nelson and Hammer Spring

Post by DavidR on 9/6/2016, 3:38 pm

dump that ils go back with normal m/s housing and a 19lb spring, everything will feel and work better.
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Re: Nelson and Hammer Spring

Post by Tim:H11 on 9/6/2016, 3:42 pm

DavidR wrote:dump that ils go back with normal m/s housing and a 19lb spring, everything will feel and work better.

The gun seems to group better with the heavy hammer spring actually. Slows the slide down or keeps it from opening completely up too fast. I do use a lighter recoil spring though. But I think from past conversations with Jon that he is right about the gun coming out of battery too quickly.


Last edited by Tim:H11 on 9/6/2016, 3:43 pm; edited 1 time in total (Reason for editing : Typo)
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Re: Nelson and Hammer Spring

Post by james r chapman on 9/6/2016, 3:48 pm

than I would say no, it won't cycle with a 30 pounder, but, that's just my humble opinion.
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Re: Nelson and Hammer Spring

Post by Chris Miceli on 9/6/2016, 4:07 pm

I talked to Larry about this a year ago and a majority of his conversion won't run correctly with the RO springs, but some have. I'm sure if you had 8lb recoil spring and stand velocity you got a better chance


Last edited by Christopher Miceli on 9/6/2016, 4:48 pm; edited 1 time in total
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Re: Nelson and Hammer Spring

Post by Tim:H11 on 9/6/2016, 4:45 pm

If I got one Id probably run a dedicated lower with correct springs for reliability and all but I was just curious is all. Thanks guys.
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Re: Nelson and Hammer Spring

Post by jmdavis on 9/6/2016, 5:21 pm

I get 3.25lbs with a converted RO, 21lb mainspring (hammer spring) and reduced sear spring. 

I don't know that you want the 19lb spring for the 45, but if it works that's fine. You can buy a kit with 19,20,21lb springs from Wolfe. 

To convert from ILS, you will need a mainspring housing, mainsprings, mainspring cap, pin and pin retainer. 

They will work with the stock RO springs. But it feels alot better to me when the ILS is removed.
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Re: Nelson and Hammer Spring

Post by james r chapman on 9/6/2016, 7:03 pm

You can get by fine with just the standard cap, spring, and pins. You can still use the ILS
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Re: Nelson and Hammer Spring

Post by Jon Eulette on 9/6/2016, 7:06 pm

I shot a Marvel on my 45 longslide for a couple years. I'd shoot .22 aggregate then switch uppers. No issues.
19# mainspring for both. 8# spring in longslide Marvel.
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Re: Nelson and Hammer Spring

Post by rreid on 9/6/2016, 8:02 pm

Thanks for posting that info, Jon. I tried a 17# mainspring with my Nelson, but I had a number of misfires the first time I shot it. I'll try a 19# and see how it works.
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Re: Nelson and Hammer Spring

Post by Jon Eulette on 9/6/2016, 8:22 pm

I use 19# for all my builds unless I absolutely need to sloww slide down a little on a 45. Then I go heavier.
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Re: Nelson and Hammer Spring

Post by Sc0 on 9/6/2016, 9:11 pm

With a 23lb mainspring in a Non-ILS housing, the only problem ammo that I have ran into is Federal HV Match 719.  The setup works fine with CCI Stdvel, Federal Automatch, and Eley Tenex.

Tried all kinds of recoil springs and different lubes, I see now that the cycling issues might have been related to the main spring being too heavy.

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Re: Nelson and Hammer Spring

Post by DavidR on 9/7/2016, 9:15 am

Tim:H11 wrote:
DavidR wrote:dump that ils go back with normal m/s housing and a 19lb spring, everything will feel and work better.

The gun seems to group better with the heavy hammer spring actually. Slows the slide down or keeps it from opening completely up too fast. I do use a lighter recoil spring though. But I think from past conversations with Jon that he is right about the gun coming out of battery too quickly.
the ils is not consistent, use a standard m/s and add a 23lb spring if you want the same resistance
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Re: Nelson and Hammer Spring

Post by Russ OR on 9/7/2016, 1:00 pm

Repeat info:   -- I kinda like the ILS housings. --- Wolff makes reduced power mainsprings for the ILS housings that work great. Several of us have installed the Wolff reduced power 24# mainsprings in our ROs with good results stock and with a conversion. For a few $s -what have you got to lose.  A touch of NecoMolyslide every couple hundred rounds helps as well.
Liking the ROs, Russ

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Re: Nelson and Hammer Spring

Post by Jon Eulette on 9/7/2016, 1:14 pm

When I referenced slowing a slide down it's in reference to 1911 .45 slide, not the conversion slide.
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Re: Nelson and Hammer Spring

Post by Jack H on 9/7/2016, 1:33 pm

I put a Nelson on a RO and only changed the spring and pins in the MSH to normal type.  Main spring is 18#.  Also put in a Colt 3 finger spring and a KC Ax hammer kit.  Works great.
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Re: Nelson and Hammer Spring

Post by jmdavis on 9/7/2016, 2:20 pm

The KC kit will come next I think. How long is the roll on yours Jack?
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Re: Nelson and Hammer Spring

Post by Jon Eulette on 9/7/2016, 3:32 pm

One thing I noticed about KC stuff is on 2# trigger roll feels shorter than a 3.5# trigger.
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Re: Nelson and Hammer Spring

Post by kc.crawford.7 on 9/7/2016, 5:26 pm

Generally the lighter the pull weight the shorter the roll feels because there is less felt resistance against the sear.  If you look at the actual movement it can be just as long.  But it feels shorter because the lighter pull weight physically gives less interaction between the sear and the hammer.
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Re: Nelson and Hammer Spring

Post by kjanracing on 9/7/2016, 9:35 pm

I have a Nelson on a stock RO. I works just fine with CCI SV. Doesn't work with Federal Target rounds, my 41 doesn't like that stuff either. 
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Re: Nelson and Hammer Spring

Post by jmdavis on 9/8/2016, 2:35 pm

I think that I am liking the 3.25 trigger more and more. I need to get the combo rail ordered for the Marvel and then start learning this gun as well as I have the Benelli and the Pardini.
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Re: Nelson and Hammer Spring

Post by spyer40 on 9/17/2016, 11:57 am

I have a Nelson on a Springfield RO.  Had a trigger job done on the stock trigger but no spring changes.  Trigger still a little heavy but functions fine.

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Re: Nelson and Hammer Spring

Post by Sc0 on 9/17/2016, 1:31 pm

Changed out my main spring from a 23lb to a 19lb, still has issues cycling the Federal Match 719 ammo.  Solution is not to use that ammo with this pistol...

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Re: Nelson and Hammer Spring

Post by Jon Eulette on 9/17/2016, 1:43 pm

If you have a lot of that ammo I'd try cutting coils off 8# spring until it worked. Then use standard spring for other ammo. 
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Re: Nelson and Hammer Spring

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