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"Modifications to my new SP101"

This is a discussion on "Modifications to my new SP101" within the Ruger Double Action forums, part of the Pistol & Revolver Forum category; Wolff spring kit came in yesterday. After several combinations of hammer springs and trigger return spring, my SP 101 preferred the 9# hammer spring, and ...


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Old April 7th, 2010, 04:41 AM   #1
 
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"Modifications to my new SP101"

Wolff spring kit came in yesterday. After several combinations of hammer springs and trigger return spring, my SP 101 preferred the 9# hammer spring, and the stock trigger return spring.

Next- the sights. Earlier, shooting way too low. In the dirt at 25 yds. So I killed two birds with one stone. Test fired the new springs, and gradually filed the front sight to get the POI where I wanted it with several types of ammo. Shot about 80 rounds including 125 gr jhp 38 +P, 158 gr 38 +P, and 158 gr 357 mag. Also, some 158 gr 38 spl. Now, POI is at POA at 25 yds for 158 gr 38 spl, and 10 yds for 125 gr JHP 38 +P, which is what I wanted. Front sight buffed with emery cloth, and re-blued. Looks like new.

Next- polishing some of the internal parts.



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Old April 7th, 2010, 05:13 AM   #2
 
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Too early-no coffee yet. Forgot to mention- trigger is GREAT after spring replacement. Close to my S&W M-19. Also, no FTF's at all with different ammo types.
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Old April 7th, 2010, 11:54 AM   #3
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texasjarhead,

sounds like you are good to go my friend! i have the bigger, GP100 revolver, but the SP101 is very high on my "to get" list. i'm thinkin about a 3" one, no hammer, .357 mag, and slickin up the trigger similar to what you have done and pairing it up with a good belt and holster. i think it would make a nice OWB carry gun.
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Old April 11th, 2010, 02:10 PM   #4
 
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Okay- did a little stoning on some of the hammer and trigger areas. Just checked my trigger pulls. Single action is now 3#, 8 oz. Double action is now 6#,6oz. Both are much better, and much smoother. Couldn't have done it without information derived from previous posts. I appreciate the members of this website!
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Old April 11th, 2010, 02:33 PM   #5
 
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That trigger action sounds great!
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Old April 11th, 2010, 09:15 PM   #6
 
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I put the 12 lb hammer spring in mine just to lighten it up a little but nothing less than that since I'll use my SP101 for CCW. It is a really nice shooter with that spring and the internal smoothing I did from the IBOK.
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Old April 12th, 2010, 05:36 PM   #7
 
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Semper Fi
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Old April 12th, 2010, 05:46 PM   #8
 
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I also did the spring modification on my GP100 as detailed in Iowegan's book. Dropped the mainspring to 12# and left trigger return spring as is for now. Went to range today and must say that the change in spring tension was very noticeable. Didn't seem to make that much difference when dry firing, but when actually shooting it felt much smoother (and easier). I haven't tackled the innards yet but that's next on my list. The spring change would seem to be one of the "must do items" on the GP100 and I'm guessing that the same would apply to the SP101's.
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Old April 13th, 2010, 09:37 AM   #9
 
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Wink

Semper Fi Nutty Ned!

Based on my "research" of reading every previous post regarding spring replacement in the SP101, I got the impression that manufacturers intentionally build firearms for "reliability" versus a smooth or "light" trigger, probably for liability reasons. Regardless, I found the hammer spring in my SP 101 to be ridiculously stiff, especially when compared to my S&W's. The good news is, a Wolff spring replacement is cheap and easy, and the original springs can always be replaced in the future, should I decide to sell.

After just a few minutes to replace and test various spring combinations, and about 30 minutes of light, careful stoning, my SP 101 now has a fantastic trigger which seriously rivals my S&W model 66 which came with a factory-installed target trigger and hammer, and is actually better than the triggers on my model 19's.

Once again, thanks to this forum and the great information, I was able to do it myself. I truly appreciate the good information I found on this site!
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Old April 14th, 2010, 06:01 AM   #10
 
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True gun manufacturers often use heavier springs to ensure reliability keeping in account that some primers may require a harder strike and some people dont maintain their firearms well.

I have orders the Wolff spring kits for all my Ruger DA's.

My latest acquisition (SP101) is sporting the reduced trigger return and a 10lb hammer spring. Still need to get it to the range after the mods. I still need to try to polish up some points.

This IBOK sounds interesting. Seems to have a lot of praise. I may have to pick one up. If someone would provide a link to the specifics for ordering it I would appreciate it.
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Old April 14th, 2010, 06:07 AM   #11
 
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Quote:
Originally Posted by way2fast View Post
This IBOK sounds interesting. Seems to have a lot of praise. I may have to pick one up. If someone would provide a link to the specifics for ordering it I would appreciate it.
http://rugerforum.net/miscellaneous/...gun-guide.html
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