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Old October 10, 2012, 05:55 PM   #7
Mello2u
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Join Date: February 21, 2009
Location: Georgia
Posts: 1,424
If you look at the graph on the link:
http://www.ballisticsbytheinch.com/calibers.html

If you average the energies of all of the loads (excluding that low Blue line) at 2", it is just under 300 ft-lbf. Then compare that to the average at 4" which is just over 600 ft-lbf. So you get a bit more than a 100% increase for going with a 4" compared to a 2".

When you compare the 4" to the 6" barrel it shows an energy of just under 800 ft-lbf, you get an increase of about 30%.

When you compare the 6" to the 8" energy figure of about 900 ft-lbf; you have an increase of about 12.5%.

Guess this is why many people "settle" for a 4" or 5" barrel as "good enough".
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