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  • Re: Firing pin question
    • JPE (Login JPE0392)
      Posted May 17, 2017 12:01 AM

      Ok lets talk S&W revolvers. A low firing pin strike on primer has nothing to do with the firing pin spring as a lot of S&W Models don't even have a spring a all. Possible causes? Has the hammer nose bushing been checked for alignment? Has the cylinder been checked for proper alignment to the frame (slash)firing pin hole? The firing pin spring only keeps the firing pin from flying up when hammer falls and contacting top of frame and slowing down hammer as it contacts primer. The hammer nose bushing directs the hammer nose (firing pin)to the primer. A professionally done trigger job consists of no less than 50 checks, adjustments, and refitting of internal parts. It takes anywhere from 3 to 5 hours, sometimes much more to make a trigger operate as a Champion shooter requires it to work. A trigger job does not come out of a bag and include two lighter springs. A strain screw was never meant to be adjusted, it is meant to be screwed down tight and never loosened except to remove for a total cleaning. The main spring on any S&W Revolver (except j frames)needs to provide a minimum hammer fall of 3 LBS. for Federal match primers and at least 3.5 LBS. for any other Primers. If you are changing the tension of the strain screw you are changing the geometry of the main spring resulting in inconsistent ignition (miss fires).The strain screw was never intended to be a means of lightening the trigger pull weight.Many things cause misfires. End shake, hammer nose protrusion, unseated primers, hard primers, hammer contacting frame or side plate, timing ,ranging etc. just to name a few . I assure you Philip Hemphill ,Robert Vadeaz and any other Champion shooter does not get their trigger job out of a bag and expect that alone to produce Championship results. JPE
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