The .223 Rem.
(9 Photos)
The .223 Rem. is a very versatile round with loading options for everything from varmints up to whitetails and even self-defense.
Posted by: Richard Mann
Very Similar
Externally, there is no difference in the .223 Rem. and the 5.56 NATO cartridge. The difference is found in the pressure each cartridge generates and in the way the chambers are cut into the barrel.