A .223 question--

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A barrel chambered for a .223 only shoot .223. Semi-auto or not.

A barrel chambered for a 5.56 will shoot both, Semi-auto or not.

Then there is the .223 wylde and will shoot both as well.

It is STRONGLY recommended you do not shoot 5.56 ammo in a rifle chambered for a .223
 
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The .223 chamber has a shorter leade and may be a problem (on paper) with heavy 5.56 bullets (longer) If you are shooting XM193 either chamber is OK.

I have not been able to find any documented case of 5.56 in a .223 chamber being a problem and people have been mixing these for years.
 
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The .223 chamber has a shorter leade and may be a problem (on paper) with heavy 5.56 bullets (longer) If you are shooting XM193 either chamber is OK.

I have not been able to find any documented case of 5.56 in a .223 chamber being a problem and people have been mixing these for years.
I would second that.
I have never actually seen a gun blown up by mixing them back and forth in a .223 chamber...
I have seen bolts that were REALLY hard to extract.. but not damaged.
he above that I posted is just generally the rule of thumb and strongly recommended you don't shoot 5.56 in .233 chambers.

Those are great reads Deadeye!!
 

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