Stoning lowers trigger pull

Discussion in '1911 Gunsmithing' started by paid4c4, Jan 29, 2012.

  1. paid4c4

    paid4c4 Supporting Addict Supporting Addict

    Sep 26, 2011
    I recently acquired a polishing or finishing set of stones from Brownell's. The set has an India stone and two Arkansas stones. I disassembled my recent 1911 build which produced a consistent 3.5 trigger pull. I stoned all the parts connected with the ignition system. Even though I used a Wilson Combat frame/slide for this build and mostly WC bullet proof parts I used a Nowlin Speed Demon ignition system. The Nowlin system came from Brownell's and the pieces are pre-fit at Nowlin's. After I stoned or finished the parts I measured the trigger pull several more times and each time got a reading of 3.25 for a quarter pound loss of pull. I realize that isn't much but I thought it interesting that just a little finish work would make that kind of difference. Now I'm wondering how finishing or smoothing some of the parts on my M1 Garands might effect its overall operation.
  2. wichaka

    wichaka Member

    Sep 8, 2011
    Any friction will cause the trigger to be heavier than if the parts are smoothed.

  3. 50GI-Jess

    50GI-Jess Member

    Aug 24, 2011
    Polishing the hammer hooks, Disconnector, hammer/sear pins also helps some. Another trick is to glue some 2000 grit paper to a piece of hard flat steel piece, that has the same width as your polishing stones, and finalize the sear engagement surface with a mirror polish.
    Another thing about pre-fit hammer/sear/disconnector/spring kit, is that they are custom made within 1911 blue print specs, and due to minor frame/pin hole variations from manufacturer to another, may change hammer/sear relation sometimes.
    This should be double checked by use of magnifying glass and magic marker on the contact surfaces. Better safe than sorry.

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