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Old March 5, 2013, 06:46 PM   #3
RBid
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Join Date: March 10, 2012
Posts: 1,059
From a Glock 19 to a Beretta 92FS, I'd expect a difference of about 30-35 fps. I would guess that the G19 makes about 15-20 fps more than a standard 4" barrel, due to polygonal barreling. Subtracting that from the estimated 50... 30-35.

Others may provide more clarity.
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