.223 and 5.56 differentiation?

[wishin]

The last time I checked the RRA website, they were selling both the .223 and the .223 Wylde barreled AR's.

 

[Texas Bob]

In over 40 years of history observed by me, I've seen the following to be true: Shoot 223 in a 556 chamber all day long, no problem. Shoot 556 in a 223 chamber when it is cold weather, no problem. Shoot 556 in a 223 chamber when it is hot outside, PROBLEMS. By "problems" I do not mean a Kaboom, however, expect blown primers tying up the firing control group, crud coming back at your face, and in general, who needs that.

 

[Elm Creek Smith]

The Ruger Mini 14 manual states that the Mini 14 is chambered to accept either the .223 Remington or the 5.56x45mm NATO. The caliber marking on the Mini 14 receiver is .223 Rem. Other than this, I wouldn't shoot 5.56 in a .223 marked gun.

ECS