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Speed Six mainspring swap

This is a discussion on Speed Six mainspring swap within the Ruger Double Action forums, part of the Pistol & Revolver Forum category; IF I decide to lighten up the mainspring on my Speed Six, do the Wolff springs you use for the GP100 work? The factory Speed ...


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Old January 31st, 2020, 10:42 AM   #1
 
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Speed Six mainspring swap

IF I decide to lighten up the mainspring on my Speed Six, do the Wolff springs you use for the GP100 work? The factory Speed Six spring is 16# and reduced power is listed as 14#. I was thinking of trying the 12# Wolff I have laying around made for the GP. I didn't know if they were the same size. It's not going to be defensive weapon.



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Old January 31st, 2020, 02:19 PM   #2
 
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You should use Wolf's "Ruger double action" springs.
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Old January 31st, 2020, 02:37 PM   #3
 
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Originally Posted by notathome View Post
You should use Wolf's "Ruger double action" springs.
https://www.gunsprings.com/RUGER/DOU...3/mID52/dID230
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Old January 31st, 2020, 05:42 PM   #4
 
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The mainspring out of a GP/SP will work in the Speed Six. I had a Speed Six that I put the 9 lb mainspring in after I had the gun tuned. It works so pick the weight you desire of Wolff spring: 9, 10, 11, 12. I think a search here will turn up some others that have done the swap. The string is a couple of years old. I originally tried the Wolff Six Series springs and the trigger pull was not reduced much.
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Old February 1st, 2020, 01:00 PM   #5
 
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Originally Posted by Rover View Post
The mainspring out of a GP/SP will work in the Speed Six. I had a Speed Six that I put the 9 lb mainspring in after I had the gun tuned. It works so pick the weight you desire of Wolff spring: 9, 10, 11, 12. I think a search here will turn up some others that have done the swap. The string is a couple of years old. I originally tried the Wolff Six Series springs and the trigger pull was not reduced much.
Bingo, that's what I wanted to know, thanks. Since my speed six is DAO/spurless the lighter weight of the hammer may require a heavier spring? So I'll start with 12# and work my way down checking reliability. I put a 10# Wolff in my SP101 DAO and it's been 100% reliable with no light strikes. I checked out the wolff spring set for six series. Reduced power=14#, a 16# and a heavy=17# so I guess stock is 16#. I don't under stand why since GP100 spring set is 9, 10 & 12#.

Last edited by stonebuster; February 1st, 2020 at 01:05 PM.
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Old February 2nd, 2020, 09:52 AM   #6
 
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I think the stock spring on the GP is 14 lbs. I have seen some claim the trigger return spring is 12 lbs and some saying at some later date after introduction the return spring is 10 lbs. The GP could have started with a lower rate spring than the Six Series either due to learning from the Six Series or due to internal geometry allowing a lighter spring. Usually, the GP will work with a 10 mainspring and often a 9 lb one. Depends upon whether action has been smoothed/tuned and firing pin protrusion along with other tolerances. Your plan of starting at 12 sounds good. Actually having a bobbed lighter hammer will not need a heavier spring but can use a lighter one.

Last edited by Rover; February 2nd, 2020 at 09:54 AM.
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