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If you have muzzle velocity in fps and want to know energy in ft. lbs:
Square velocity. Multiply result by mass of bullet in grains. Divide by 450450.
 
I deleted the original because a moderator moved the post from General Firearms to Reloading. It's not a reloading question, it's general firearms. I asked to move it back, crickets, so deleted.

Thats what you get.
 

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