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I have a couple noob questions

Discussion in '10mm Reloading Forum' started by panzer10mm, Dec 8, 2010.

  1. panzer10mm


    Nov 29, 2010
    What exactly is keyholing, and what is the glock smile? (i don't have a glock but i'm curious)

  2. Tumbling bullets that are not properly spin-stabilized leave keyhole-shaped holes in a paper target.

    There are at least two unrelated phenomena referred to as "Glock smiles":
    - A bulge at the base a spent case caused by the shape of a Glock chamber (esp. in 10mm and .40S&W);
    - Wear marks on a Glock barrel where it touches the slide.
    Last edited: Dec 8, 2010

  3. panzer10mm


    Nov 29, 2010
    That's wierd because all of the cases I shoot out of my dan wesson have this bulge your talking about. Is the bulge attributed to a loose chamber or is it just a byproduct of the 10mm or 40 s&w case at high enough pressures?
  4. B__


    Mar 31, 2009
    In your case you likely need a stronger recoil spring to hold the gun in battery longer. Pretty much all 10mm should run a 20# spring or higher. 20 is plenty IMO though.
    Last edited: Dec 9, 2010