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Velocity gains in long barrels with pistol cartridges

Discussion in 'Rifle Country' started by dispatch55126, Jul 16, 2009.

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  1. dispatch55126

    dispatch55126 Member

    Oct 8, 2006
    What kind of velocity gains can be had by shooting 9mm in an 18.5 inch barrel vs. a 4 inch barrel? 9mm has been around for a long time so I know the powder and charge is calibrated for short barrels.

    The second part of this question may be better suited for the reloading section, but would loading a slower burning powder increase the velocity in a longer barrel?
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