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Old March 21, 2013, 10:43 PM   #6
jimbob86
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Join Date: October 4, 2007
Location: All the way to NEBRASKA
Posts: 6,781
Depends upon the burn rate of the powder, I would think.

A very fast powder would actually generate a slower velocity (at safe pressure) in the longer barrel- you'd get to max pressure before you got top velocity.

Longer barrels favor slower powders, generally.
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