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I have both 223 and 5.56 rounds on hand, pic related. My AR's lower says .223 caliber, but it has a 5.56 NATO barrel on it. I assume due to the barrel it's safe to shoot the 5.56, but what about the 223?

Before thinking about it much I've shot both through it, and nothing went wrong. Well, yet. After thinking about it I'd rather get some second opinions before chancing it again.

Internet literature and video research turned up inconclusive results, at least from what I found.

I have both 223 and 5.56 rounds on hand, pic related. My AR's lower says .223 caliber, but it has a 5.56 NATO barrel on it. I assume due to the barrel it's safe to shoot the 5.56, but what about the 223? Before thinking about it much I've shot both through it, and nothing went wrong. Well, yet. After thinking about it I'd rather get some second opinions before chancing it again. Internet literature and video research turned up inconclusive results, at least from what I found.

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There's slight difference in head space. A .223 Wylde is for shooting both rounds.