The Firing Line Forums - View Single Post - how much more speed a 9mm would have from 4" to 5" barrel?

RBid · March 5, 2013, 06:46 PM

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.

March 5, 2013, 06:46 PM	#3
RBid Senior Member 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. __________________ Currently Own: Beretta PX4 9mm, Glock 23 (Gen 4), Glock 19 (Gen 4) x2