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(Written in Javascript.) If you like this little calculator, please shop at these sponsors: SportsmansGuide.com for outdoor gear. Dunhams Sports Cheaper than Dirt! Sporting Goods Discounter. Energy = .5 * weight * velocity^2 / 7000 / 32.175 Where weight is in grains, and velocity is in feet/second. 7000 is grains per pound, and 32.175 is acceleration due to gravity. It can be re-written: Energy = weight * velocity^2 / 450450 Questions/comments: custom_guns /aat/ yahoo /doot/ com |