There is an equivalency between the kinetic energy of the US M193 at 325 yards and the 45 ACP handgun at the muzzle. Going strictly by the anecdotal evidence forwarded by some of the terminal effectiveness of 45 ACP handguns, the 223 Remington rifle will offer terminal ballistic advantages ove...
those smaller diameter .284″ bullets used by the 7mm Rem Mag have a higher ballistic coefficient and more sectional density than .30 caliber bullets of the same weight used