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S&W .22LR light striking issue

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  • darkwater
    Senior Member
    • Jun 2009
    • 784

    S&W .22LR light striking issue

    My wife bought a used Smith & Wesson 317, which is a .22LR 8-shot revolver with a 1 7/8" barrel. It supposedly had only been taken out a few times with no more than a couple hundred rounds fed thru it, and the condition seemed to support that upon visual inspection. However, once we got it out to the range, it was not performing 100%. An average of 3 out of the 8 rounds in the cylinder would not fire in double-action mode. Firing the gun in single-action, however, resulted in a successful discharge every time. We tried Federal, Remington and CCI ammo, and still the double-action mode would average about 3 rounds that did not fire. There didn't seem to be a pattern as to which three, either...sometimes it would be evenly spaced between successful discharges, and sometimes 2 or 3 failures would be in a row. Looking at the firing pin strikes on each cartridge, they definitely appeared to be very light, with some being a barely noticeable dent, not the well-defined crater that my Ruger Single-Six typically produces. Our gunsmith has looked at it and tried to make a few adjustments, to the spring tension I believe, but says it is still not 100%. His next move is to see if replacing the firing pin will help. I had considered sending the gun to Smith & Wesson, but since my wife is not the original owner, it doesn't appear that it would be covered by the warranty.

    Has anyone else come across an issue like this in a fairly new .22LR, especially an S&W, and what was done to correct it? Thanks in advance!
    All animals are equal but some animals are more equal than others. -George Orwell, Animal Farm

    If both the past and the external world exist only in the mind, and if the mind itself is controllable, what then? -George Orwell, 1984

    In a time of universal deceit, telling the truth is a revolutionary act. -George Orwell

    You're off the edge of the map, mate. Here there be monsters. -Captain Barbossa
  • #2
    Millions-Knives
    Senior Member
    • Aug 2006
    • 623

    Maybe the original owner replaced the mainspring and the rebound spring?
    Some of these kits allow for a lighter trigger pull at the cost of reliability.
    John

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    • #3
      tzahoy
      Member
      • Jan 2005
      • 449

      First thing to check is the strain screw that tensions the main spring. Sometimes they back out. It's on the front strap near the bottom of the grip frame. Take the grips off, and make sure it's tightened all the way.

      I run a Wolf reduced power mainspring with 100% reliability with all kinds of ammo in my model 17. The trigger return spring has no effect on the striking force of the hammer, and therefore no effect on ignition reliability.

      Comment

      • #4
        darkwater
        Senior Member
        • Jun 2009
        • 784

        Thanks for the advice!
        All animals are equal but some animals are more equal than others. -George Orwell, Animal Farm

        If both the past and the external world exist only in the mind, and if the mind itself is controllable, what then? -George Orwell, 1984

        In a time of universal deceit, telling the truth is a revolutionary act. -George Orwell

        You're off the edge of the map, mate. Here there be monsters. -Captain Barbossa

        Comment

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