When it comes to choosing between the 300 Blackout and the 5.56 NATO, many firearm enthusiasts are left wondering which one is truly the superior round. Both cartridges have their unique advantages, ...

For most shooters the difference between .223 Remington and 5.56×45 NATO is minor, but it matters because 5.56 is typically loaded to higher pressures and uses a slightly different chamber leade.

Some believe the 5.56 NATO was the original military cartridge and that the 223 Remington was the civilian offshoot. That’s not the case. In 1970, NATO (North Atlantic Treaty Organization) affiliated ...