Velocity gains in long barrels with pistol cartridges


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dispatch55126
July 16, 2009, 11:24 PM
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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