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G20 vs G29 in velosity.

Discussion in '10mm Reloading Forum' started by Sherlock Glock, Apr 11, 2012.

  1. Sherlock Glock

    Sherlock Glock Lifetime Member

    Jul 30, 2003
    Dallas, Texas area
    Has anyone chronographed The same ammo in both glocks.
    I am interested in seeing how much slower the G29 is over the G20.
    That is I assume the shorter barrel will be slower
    with factory ammo.

    Sherlock Glock
    I love my G29 10 mm.
  2. SDGlock23

    SDGlock23 Glockoholic

    From what I've read (and I've owned both BTW), there's only about 60-75 fps difference in velocity. There will be more loss with lighter bullets than with heavier bullets.

  3. WeeWilly


    Nov 12, 2011
    You can go to the stickies of the various manufacturer's powders on the top of this subforum and they have many, many chrony readings of similar loads used on the different length barrels. It won't take long to get a feel of what type of load are affected the most by barrel lengths and what the effect might be.
  4. Big Sam

    Big Sam

    Jul 13, 2007
    I chrono everything I shoot. Give or take a bit, going from a G20 to a G29 will drop the velocity 60 fps. All my work has been with 155, 165 and 180gr jacketed bullet. Nothing with 135's or 200's or lead.
  5. arushus

    arushus Biggest Member

    Jul 22, 2011
    NE Oklahoma
    Check out a website called ballistics by the inch..
  6. Kegs

    Kegs Ol 8 fingers ;)

    Oct 26, 2009
    Cold side of conus
    60 fps comparing stock bbls. I have an aftermarket exits length bbl on my G29, equates to G20 , carries like G29! :)