There's already a wealth of information out there, both online and in print, about the differences between .223 Remington and 5.56x45mm NATO. Sadly, a lot of this information is either misguided, ill-founded, or just plain wrong. We’re going to try to set the record straight. These are two cartridges that are really just about as similar as you can get, and are identical from an 5.56 NATO VS. .223 Remington external viewpoint, so the confusion is understandable. Hopefully, though, we can clear up some of the issues surrounding these two cartridges and help you choose between them. This is especially...