This app calculates the muzzle energy and Taylor KO factor for a projectile based on the mass, velocity, and diameter. Muzzle energy is computed using the firearm industry39;s standard formula. Taylor KO factor is a comparative measure of the knockdown power of a projectile. The formula was developed by John Taylor, an African game hunter, to compare the effectiveness of hunting cartriges.support located at techandtopics.blogspot.comSupplied under the GNU GPL v3.0