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Thread: Trigger doesn't reset

  1. #1
    Join Date
    3rd August 2007
    Posts
    61
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    0

    Trigger doesn't reset

    I have an old Colt Government Model in .38 Super with a trigger that doesn't reset. After some experimenting, I think it is a magazine problem, but one I haven't experienced before.

    With no magazine in the gun, it functions like it should.
    With the factory magazine, if also functions like it should.
    With an aftermarket Checkmate magazine, It is interfering with the trigger return somehow. After firing, the trigger does not reset. The disconnector seems to usually (but sometimes not) disengage the sear. Sometimes I can cock the hammer and the sear will hold it, sometimes not.

    The only thing I can think of is possibly the checkmate magazine is a little 'thick', so the trigger drags on it. It doesn't feel any thicker though.

    Does this seem like a reasonable explanation?

  2. #2
    Join Date
    2nd June 2004
    Location
    Terra
    Posts
    22,198
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    875
    Remove the trigger from the pistol and see if it fits easily over the suspect magazine.
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside

  3. #3
    Join Date
    8th November 2005
    Location
    PNW
    Posts
    36
    Posts liked by others
    11

    Calibrating magazines

    Before disassembly, "mic" both magazines top, middle and bottom for width side to side.

    If the Checkmate is wider than the original, then it is probably too wide to clear the trigger bow and not allowing smooth operation.

    As a high-volume shooter sonic cleaning and "calibrating" magazines was regular annual maintenance!

    Magazines out of spec can be "calibrated" by slightly squeezing the mag tube in a vice!

    There is a mandrel that can be used to calibrate mags that are too narrow as well.

    For some reason 10 round, 9mm magazines were really bad for going out of "calibration"! The feed lips seemed to grow over time making "drop free" impossible!

    Smiles,
    Last edited by jjfitch; 10th August 2022 at 20:12. Reason: Syntax


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