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To calculate kinetic energy, you take the mass of the projectile and multiply it by the velocity squared (K.E.=½ mv^2). This is what most people are thinking about when they think of power.
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Kinetic energy: Kinetic energy of the bullet is the energy transferred to the target when it. Muzzle energy: is the amount of kinetic energy measured as the projectile leaves the barrel. With air pistols, it is almost always measured in feet per second (FPS). Muzzle velocity: Is the speed of the pellet or BB as it leaves the barrel. Remington Benjamin Sheridan 1875 Revolver
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