September 25, 2012, 09:24 AM
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#4
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Senior Member
Join Date: October 14, 2009
Location: Sunshine and Keystone States
Posts: 3,391
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The formula is Energy (foot-lb) = Weight (grains) times Velocity (ft/sec) Squared divided by 450395 (fixed constant).
(from http://www.reloadammo.com/footpound2.htm)
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My guns include S&W and Colt revolvers, Colt and Ruger pistols, Remington 870 shotgun, Henry and Marlin .22LR rifles, Hi-Point 9mm carbine and Lancaster Arms AK. I reload handgun rounds with a Lee hand press, over 18K rounds since Nov. 2009 with nary a squib nor kaboom. 
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