Two of the most popular cartridges today are nearly identical and sometimes considered transposable, but when looking at 5.56 vs .223, there are some key differences. The .223 Remington started as a ...

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** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** When it comes to home defense, the ...

The 5.56 NATO is a higher pressure military derivative of the 223 Remington. The cartridge has been around since about 1979, and due to the availability of military surplus ammunition, it has become a ...