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Old 03-13-2007 | 09:42 PM
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buckeye
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From: The OH-IO
Default RE: Kinetic energy
Formula for kinetic energy...... Take your total arrow weight in grains and divide it by 450435. Then Multiply that by the speed of your bow squared.

Example: 387 grains/ 450435X 287fpsX 287fps= 70.7689 ft. lb. of KE
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