Model 66 no dash light primer strikes

[bananaman]

I never had that problem with the used Smith Revolvers I picked up. THEN, I picked up a 2" 10-5, RB. Had the light strikes. Changed the strain screw, and problem solved. (it had been shortened) Bought a K, 10-6, PPC, that was the same way. New screw, problem solved. Bubba knows how to shorten strain screws. Bob

 

[RMFnLA]

This sounds like the best solution , I will order them and let everyone know what happens.

Do I need any kind of special tool to change the leaf spring ?

Why order parts that you are not sure you need?

Shortening the strain screw is the most common thing done to lighten trigger pull.

Measure yours, post the results here so it can be compared, and then you will either know that is the part that needs to be replaced or eliminate it as the culprit.

 

[Jingles]

It's not just Bubba who shortens strain screws. In his Youtube video on installing spring kits Jerry Miculek tells the proper way to shorten the strain screw. Skip to 4:30 for that part.

[ame]https://www.youtube.com/watch?v=H9gn7zE5b3g[/ame]

 

[Narragansett]

You might consider picking up a set of gunsmith specific screwdrivers. That way you minimize damage to the screw heads.

I just bought the super duper 58 pc +/- Brownell set, and I could not take a side plate off an old model 12. Bought the GRACE HG7, 7 driver pistolsmith set for like 32.00. Go that way first. I got mine from Optics planet. save yourself 90.00

 

[RMFnLA]

Why order parts that you are not sure you need?

Shortening the strain screw is the most common thing done to lighten trigger pull.

Measure yours, post the results here so it can be compared, and then you will either know that is the part that needs to be replaced or eliminate it as the culprit.

BTW, lots of old timers used to shim the strain screw with a thick piece of leather.

It smooths the action a little and in your case might give enough extra oomph to fix your problem.

 

[Seven High]

One other thing that you might try is to put on a set of wood grips. Some brands of rubber grips put pressure on the mainspring when installed, which causes erratic firing.

 

[Bastogne71]

The strain screw in my M-66, with the stainless steel sights, is 0.475" from the base of the head to the tip of the screw. The tip should be evenly rounded with no machine or file marks. If yours is shorter than this, replace the screw. If the screw is ok, replace the mainspring with a standard weight spring. If this doesn't fix your problem, let us know & we can explore less likely issues that may be causing misfires.

 

[Muley Gil]

BTW, lots of old timers used to shim the strain screw with a thick piece of leather.

It smooths the action a little and in your case might give enough extra oomph to fix your problem.

I have used a leather pad between the mainspring and the frame on a Colt single action revolver. This was done to lessen the strength of the spring.

The spent primer cup on the end of the strain screw, mentioned above, lengthens the screw to increase the hammer fall.