Rankings shown here are based on a 3.75-inch pistol barrel. Rankings for guns of this caliber in our database will vary based on their actual barrel types and lengths.
                    PF-Power Factor
                        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
                    
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