Definition of muzzle energy
: the energy of impact of a bullet at the velocity developed at the muzzle of the piece and calculated according to the formula ME = 1/7000 V2 ÷ 2g x w where ME represents muzzle energy in foot-pounds, V2 the square of the muzzle velocity in feet per second, g the acceleration due to gravity, and w the weight of the bullet in grains avoirdupois
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