DA Trigger Pull Smoothing of a Different Kind

SW357Addict

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Hello.

I have owned several S&W revolvers over the past 5 years with each having various degrees of smoothness in the double action trigger pull. Some have been very smooth and others not so much. I purchased a Model 27-2 3" about 6 months ago that has the best trigger pull of any S&W or Colt I have ever held, owned or fired. It is an older, S-serial numbered gun that has definitely had an action job. But I think it's action job is different; more than just the trigger and hammer parts have been smoothed. They cylinder which is what I consider to be the second half of the trigger pull in DA has also been smoothed.

I have read about double and single action trigger pull lightening and smoothing in several books and online resources and they all only talk about modifying the sears, or smoothing the rebound slide, using lighter springs, adjusting and smoothing the cylinder stop, and other methods. Using the excellent resource of book on S&W's by Jerry Kuhnhausen, it talks about testing the double action smoothness with the cylinder swung out as to eliminate this as a variable. When I do this to most all of my S&W's, the triggers are smooth as silk in DA without exception. The problem is with the cylinder closed that my S&W's vary from smooth to feeling like sand.

This brings me back to my M27-2. The trigger job done on it also included smoothing and polishing the lead-in relief cuts before the cylinder stops. They are so smooth as to be shiny.

I have never read or heard of anything like this and there does not seem to be much info on the proper way to do this.

Could someone who knows more about this enlighten me?
 
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My model 66 has the cylinder lead-in cuts lengthened and polished to help consistent rapid double-action firing.
It was done carefully by hand more for reliable lockup than smooth trigger pull; that was another benefit.
I tend to go through cylinder stops and springs.
 
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