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jmr40 · November 10, 2012, 09:12 PM

http://www.ballisticsbytheinch.com/44mag.html

This is about as good a guess as you'll get without a chronograph. They show about 1600 fps from a 20" gun, but individual guns can vary quite a bit. A barrel much longer than 18-20" will gain a small amount, but not as much as you'd see between handgun lengths and carbine lengths.

November 10, 2012, 09:12 PM	#2
jmr40 Senior Member Join Date: June 15, 2008 Location: Georgia Posts: 10,809	http://www.ballisticsbytheinch.com/44mag.html This is about as good a guess as you'll get without a chronograph. They show about 1600 fps from a 20" gun, but individual guns can vary quite a bit. A barrel much longer than 18-20" will gain a small amount, but not as much as you'd see between handgun lengths and carbine lengths.