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Light primer strikes on SW 625JM

Discussion in 'Handgun Discussion' started by Chipperxd, Aug 16, 2011.

  1. Chipperxd

    Chipperxd Buffalo Active Member

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    I am starting to see more and more light primer strikes in DA. In SA, all rounds fire just fine. At first I thought it was just a few hard primers but I am starting to notice them more and more. Even with different ammo brands being used.

    Is there anything I can adjust/change/tweak to solve this problem?
     
  2. BillM

    BillM Amity OR Bronze Supporter Bronze Supporter

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    First thing to check is the strain screw. If it backs out the hammer fall weakens. Probably have to take the grips off. Front of the gripframe, down toward the bottom. Should be screwed all the way in, although some people "adjust" it by unscrewing it a turn or 2. While you have the grips off, look for bugs, crud, dead mice---anything gumming up the works that would retard the hammer fall. Unless you KNOW what you are doing, there probably isn't anything under the sideplate that you need to be concerned with.

    Still hitting light? Couple of things you can do. If you just REALLY love the current trigger pull and don't want to do anything to mess with it, put in an extended firing
    pin. Easy to do with the frame mounted pin guns. Don't want to do that? Put
    a little more bend in the mainspring or replace it.

    FWIW--it doesn't take a very hard primer to get misfires on a 625.
    EVERYBODY that I know that shoots one in competition used Federal primers
    They are the only thing that will light off 100% on a gun with a competition
    trigger job.

    ETA. Wow. Got the dreaded "bubblegum" for r-e-t-a-r-d as in "To hinder the advance or course of; impede;delay." Interesting.
     
  3. jordanvraptor

    jordanvraptor Oregon City, Oregon Well-Known Member

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    I had the same thing happen with my 329 PD. The fix was an extended firing pin. S&W uses the short firing pin for extra safety margin on the drop test is what I've heard.
     
  4. Chipperxd

    Chipperxd Buffalo Active Member

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    thanks for the info fellas. really appreciate it.