625 spring kit

[nch734]

I've read lots of places where people put in the wolff power rib type 2 spring kit and get reliable ignition and around a 7.5lb trigger.

I have a 625JM that I put the spring kit in and the trigger is measuring 6lbs (!) and of course I'm not getting ignition on anything. With the factory spring the trigger is off my scale (goes up to 11lbs).

Do I need a new tension screw? The tension screw is fitting right into the groove of the power rib spring and so it's acting like a much shorter screw. Should I replace it with a longer one?

OR should I get a type 1 spring kit or a spring kit from jerry miculeks site?

This revolver will be used at the range only, for general target shooting and IDPA.

 

[TAROMAN]

Something's wrong there. A couple of thoughts:
Maybe your strain screw has been shortened?
A quick fix is to place the cup from a fired LP primer over the tip of the screw to increase the tension.
The JM Models, IIRC have the frame mounted firing pins.
Both of my 625s have the type 2 mainsprings and function just fine. They are, however the earlier model with the hammer nose firing pin.
Cylinder and slide make a longer firing pin for just such situations.

 

[nch734]

Yeah- I put in a cylinder and slide extended length firing pin... I should have mentioned that. Those are the only things I've done.

I bought the gun brand new, so nobody but smith and wesson has messed with it. I don't think they would put in a shortened tension screw?

Would you mind telling me-- with your type 2 spring, does the tension screw fit into the rib on the spring?

 

[Coastie762]

Check the end of your strain screw. The newer stainless ones appear to be a bit soft. I found the one on my 625-8 JM to be badly mushroomed where it contacts the spring.

I have a new one in my spare parts box; however I took the opportunity to install a 3/8" long 8x32 socket head set screw along with a Wolff Type 1 standard power mainspring and 12 lb rebound spring.

Adjusted to just below 8 lbs double action, I had 100 percent ignition with CCI primers when shot single action. I had on average one FTF per cylinder in double action. I've since tweaked the pull weight up approx. a pound. Hopefully I'll get a chance to try it again between spring snow showers this weekend.

You can find the 8x32 set screws at your local hardware store. Either the 3/8" or longer 1/2" will work. Adjust the screw to provide your desired pull, once you find your desired weight a dab of blue or purple (low strength) loctite will hold it in place.

 

[ptgarcia]

If your gun didn't come with a ribbed main spring then I think your answer is a longer strain screw. If I'm not mistaken there are two lengths available for N-frames depending on the main spring used. My 627 Pro came with a ribbed main spring and the longer strain screw. I would try one before making any other changes to the revolver.

 

[MWC2068]

I have a new 625jm with a heavy da trigger. I also put the wolf reduced power spring in and it went to 7 1/2 lbs. da but would Not ignite anything. I put in the 15 lb. rebound spring and I used 8- 32 set screw by 1/2 inch long to replace the strain screw, it's long enough to increase tension on mainspring. I am now up to 9lbs and it works most of the time , 2 light primer strikes in about 100 rounds.

 

[MrTrolleyguy]

I have a new to me 625-8 IIRC and I am getting mushrooming of the primers and will need to back off the strain screw. The strikes are too heavy. I'll look to see if it is the ribbed main spring or not.

Good luck with your gun.

 

[Dale53]

I have a 625-6 Model of 1989 and a 625-8 JM Special. I replaced the springs in both with Jerry Miculek's matched set of springs (Bang, Inc). i set the weight at 9.0 lbs. dbl action and 3.0 lbs. single action (my preference) and have no problem with ignition. I replaced both firing pins with Apex Tactical pins.

I am extremely happy with both revolvers.

FWIW
Dale53

 

[halvenut]

You might try using Federal primers and ammo,as they're softer primers. It might eliminate you problem without more mechanical changes.