Many shooters will assert there is no difference between .223 Remington and 5.56x45mm NATO and that you can safely fire both from the same rifle. Others will contest that assertion, “The two ammo types are different!”
But which one is right? Who is correct?
.223 vs 5.56 NATO has always been an issue among shooters. Is it safe to shoot 223 Remington in a 5.56 NATO rifle and vice versa? Our Ammo.com experts explain: https://ammo.com/comparison/223-vs-556