The bullet energy, remaining energy, down range energy and impact energy of a projectile may also be calculated using the above equations. If m is specified in grains and v in feet per second, the following equation can be used, which gives the energy in foot-pound force:Į k = 1 2 m v 2 × ( 1 ft ⋅ lbf 7000 gr × 32.1739 ft 2 /s 2 ) Most sporting arms publications within the United States report muzzle energies in foot-pound force. Mass, m, is usually given in grains and the speed, v, in feet per second but kinetic energy, E k, is typically given in foot-pound force (abbreviated ft-lbf).If the mass, m, is in grams and the speed, v, is in kilometres per second, the calculated muzzle energy, E k, will be in kilojoules.If the mass, m, is in kilograms and the speed, v, is in metres per second, the calculated muzzle energy, E k, will be in joules.2 Typical muzzle energies of common firearms and cartridgesĬare must be taken when using this formula that consistent units are used.* Weights and muzzle velocities for example energy calculations were approximate for general comparison only. After the pellet leaves the barrel, wind resistance starts to slow its speed. Muzzle energy is the energy calculated right when the projectile just leaves the gun barrel at the muzzle.= 1/2*M*V 2 where M is mass and V is velocity. This is the formula for kinetic (moving) energy and is calculated as K.E. To calculate muzzle energy, or Foot-Pounds Equivalent (FPE), you need to know the mass of the item being moved and the velocity it will be moving.BUT, if you triple the velocity you get 9 times the energy due to the V being squared in the energy formula! Muzzle energy is increased if you increase mass or velocity.Muzzle control for safety is **HIGHLY** recommended. NOTE: Assumes NOT using full-auto feature.
#Muzzle energy calculator metric mod
7,600,000 foot-pounds equivalent – Naval Gun: Mark 45 Mod 4 5-inch/54-caliber lightweight gun and shell (490,000 gns, 2650 FPS).50 BMG bullet with an Accuracy International AX50
338 Lapua Magnum bullet with a McCmillan TAC-338 309 foot-pounds equivalent – 9mm bullet with a Walther PPQ M2 (115 gns, 1100 FPS).357 “pellet” and Sam Yang Recluse big bore airgun for Coyotes? (95 gns, 983 FPS) 22 RWS Superdome Pellet with an Umarex Octane (14.5 gns, 1000 FPS) 1.4 foot-pounds – Steel BB with an old school airgun (5 gns, 350 FPS).An energy of 1.0 foot-pounds equivalent (FPE) is the work to move a 1 pound mass 1 foot from its original location.
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