This information is derived from a combination of sources: manufacturer's specifications,
measuruments performed by the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI)
and approximation formulas devloped by Genitron.com.
Rankings shown here are based on a 8.375-inch revolver barrel. Rankings for guns of this caliber in our database will vary based on their actual barrel types and lengths.
In shooting competition the Power Factor is used to determine the competitive division in which a particular handgun/cartridge
can be used. It is a simple calculation of the bullet's mass times its muzzle velocity.
PF = bull. mass x muzzel vel.
TKO-Taylor Knock Out Formula
Developed by big-game hunter John Howard Taylor in the 1940's, this formula calculates the relative effectiveness of bullets for hunting game.
TKO = (bull. mass x muzzle vel. x bull. dia.)/7000
This cartridge is the most powerful factory load ever developed specifically for handgun use. It was developed by Cor-Bon with the 'X-Gun' engineering team at Smith & Wesson for use in their Model 500 series revolvers. The .500 S&W Magnum can develop over 2600 ft-lb of muzzle energy, nearly three times as much as the 900 ft-lb generated by the .44 Magnum.