5906 mainspring plunger

jaci1048 · 07-03-2012, 09:03 AM

Anyone have any experience reducing the double action pull by shortening the mainspring. How many coils, etc? Before I would try it I would obtain at least one new spare.

danf_fl · 07-03-2012, 09:59 AM

Quote:

Originally Posted by jaci1048

Anyone have any experience reducing the double action pull by shortening the mainspring. How many coils, etc? Before I would try it I would obtain at least one new spare.

I do not suggest cutting any spring as a way to reduce strength.

The double action is compressing the main spring as the trigger is pulled. Lightening the spring could result in light firing pin hits.

Also the recoil spring and main spring work together to reduce the felt recoil. Reducing the main spring could mean that a stronger recoil spring is needed to compensate for the lack of resistance.

Putting in a too heavy recoil spring can lead to other problems (i.e. ejection and feeding).

jaci1048 · 07-03-2012, 03:27 PM

Thanks!

retDAC · 07-03-2012, 08:47 PM

Dan is right: springs are a balancing act, especially in a semi auto.

Get a Hammer Spring Pak Reduced Power (Stock No. 26581) to experiment with from Wolff.
Springs for SMITH & WESSON NUMBERED SERIES Semi-Auto Pistols

The trigger return spring will also affect the pull as will any roughness in parts or frame.

You don't want a lighter hammer spring if you are going to shoot +P+ ammo or even frequently +P ammo as the hammer spring also helps cushion the slide in recoil.

If you are going to do this, keep in mind the recoil and hammer springs have to be balanced for your ammo and grip - especially for self defense. The trigger return spring also has to be reliable, so if you're going to go lighter with that, again be careful.

jaci1048 · 07-04-2012, 08:34 AM

Dan & Dave,

What got me to thinking about this is I have two 5906's, one with a plastic mainspring plunger and one with what appears to be a stainless steel mainspring plunger. The plastic plunger looks somewhat worn on the bottom and seems to fit deeper into the grip and grip pin and this pistol has a lighter double and single action pull than the one with the stainless plunger. They both function perfectly with 3.9 grs. of Titegroup behind 125 gr.cast r.n. bullets. Both are police trade-ins. I wonder if someone may have modified the end of the plastic plunger?

I really like pistol and consider it a formidable weapon, especially with the Crimson Trace Laser Grips.

Thanks for your advice!

David Post
Goliad County, Texas

07-03-2012, 09:03 AM	#1
jaci1048 Junior Member Join Date: Jul 2012 Location: Goliad County, Texas Posts: 4	S & W 5906 Double Action Pull Anyone have any experience reducing the double action pull by shortening the mainspring. How many coils, etc? Before I would try it I would obtain at least one new spare.

07-04-2012, 08:34 AM	#5
jaci1048 Junior Member Join Date: Jul 2012 Location: Goliad County, Texas Posts: 4	S & W 5906 Double Action Pull Dan & Dave, What got me to thinking about this is I have two 5906's, one with a plastic mainspring plunger and one with what appears to be a stainless steel mainspring plunger. The plastic plunger looks somewhat worn on the bottom and seems to fit deeper into the grip and grip pin and this pistol has a lighter double and single action pull than the one with the stainless plunger. They both function perfectly with 3.9 grs. of Titegroup behind 125 gr.cast r.n. bullets. Both are police trade-ins. I wonder if someone may have modified the end of the plastic plunger? I really like pistol and consider it a formidable weapon, especially with the Crimson Trace Laser Grips. Thanks for your advice! David Post Goliad County, Texas

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07-03-2012, 03:27 PM	#3
jaci1048 Junior Member Join Date: Jul 2012 Location: Goliad County, Texas Posts: 4	Thanks!

07-03-2012, 08:47 PM	#4
retDAC Senior Member Join Date: May 2006 Location: Huntsville, Ala. Posts: 409	Dan is right: springs are a balancing act, especially in a semi auto. Get a Hammer Spring Pak Reduced Power (Stock No. 26581) to experiment with from Wolff. Springs for SMITH & WESSON NUMBERED SERIES Semi-Auto Pistols The trigger return spring will also affect the pull as will any roughness in parts or frame. You don't want a lighter hammer spring if you are going to shoot +P+ ammo or even frequently +P ammo as the hammer spring also helps cushion the slide in recoil. If you are going to do this, keep in mind the recoil and hammer springs have to be balanced for your ammo and grip - especially for self defense. The trigger return spring also has to be reliable, so if you're going to go lighter with that, again be careful.