In doubt about Wilson spring kit

[Fritz007]

Did buy the following spring kit from Brownells:

BROWNELLS : WILSON COMBAT : #321 S&W J FRAME SPRING KIT - World's Largest Supplier of Firearm Accessories, Gun Parts and Gunsmithing Tools

Want to use it on a S&W 340 SC, i.e. a scandium J Frame hammerless gun.

The rebound springs are all ways longer than the original one. Astonishingly the longest is labeled to be the weakest. Is there anything wrong with this?

So far did not dare to mount them.

Thanks for your advice,
Fritz

 

[Black_Sheep]

I've used the Wilson kit on a Model 60 and a Model 642, both perform flawlessly...

 

[HEADKNOCKER]

You'll find that most reduced power rebound springs will be longer overall than the factory spring.. The coils diameters are smaller...
If you get good return with the weekest spring go for it, If not then move up till you find one that works best for you.
Being the 340 is DAO you may want to go with the 14 or 15lb spring for quicker return..
Also polishing the outside of the rebound spring slowly with flitz & a dremel plus the rebound slide itself & the hole within it plus deburing the mainspring strut & polishing the inside of that spring with a Q-Tip chucked in the dremel will make the trigger pull & return quite a bit smoother..
Be carefull installing the longer rebound spring & don't exert any force on the pin that it goes under as they have been known to break, The Sc guns use a Titainium pin & it's not supported when the side plate is removed..
Don't forget to lightly oil all the moving parts + springs & the strut..
I had a 342Ti that I used the lightest springs with & it was 100%..
If you have light primer strikes you can also aquire a aftermarket firing pin that has more protrution or even modify the existing one with a few strokes from a round file
Cylinder & Slide plus another company offers these firing pins & are easy to change on the newer MIM guns..
Good Luck!!
Gary/Hk

 

[Fritz007]

Thank you for the information. Did mount the lightest springs. Works great. After all I would say that polishing of the MIM-Parts with the original springs had a much greater effect then the exchange of the springs.

Fritz