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Discussion Starter · #1 ·
Either one mag of one and another of the other? Or mixed in the same mag?

Have a rifle cambered for both.

Sorry for the dumb question.
 

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Yes

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Sure you can not sure why but it will feed just fine.
 

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Chambered for both? It must be 5.56x45 NATO or .223 Wylde. If you have a standard .223 chamber do not fire 5.56x45 from it. This would result in excessive and dangerous chamber pressure.
 

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So long as your rifle is chambered 5.56, yes. I wouldnt expect pinpoint accuracy though. I'm no ballistics expert, but I would imagine all else being equal, the .223 and 5.56 may have slightly different points of impact at distance. I could be wrong though. I'm sure smarter folks will chime in.... :eureka:
 

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Case dimensions are the same, the difference is in the longer throat of the 5.56 chamber. 5.56 typically use longer (& heavier) projectiles loaded to higher pressures. I've used reloaded 5.56 cases exclusively in my .223. If your rifle is stamped .223/5.56, it's a 5.56.
 
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Case dimensions are the same, the difference is in the longer throat of the 5.56 chamber. 5.56 typically use longer (& heavier) projectiles loaded to higher pressures. I've used reloaded 5.56 cases exclusively in my .223. If your rifle is stamped .223/5.56, it's a 5.56.
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Think of it this way: a .223 is a citizen round, 5.56 a military round. A little different as far as ballistics are concerned, but should not be a problem as long as your weapon is spec'd for 5.56.

I guess my question would be : Why would you mix them?
 

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Will mixing .223 and 5.56 cause a malfunction? no.
Would I recommend doing it? Also no. Mixing even different types of .223 will cause problems for you in regard to accuracy, since each round has a specific trajectory, based on it's design. It'd be like trying to bowl, and using a different weight ball for every frame. You'll have no consistency.
 

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Discussion Starter · #12 ·
Think of it this way: a .223 is a citizen round, 5.56 a military round. A little different as far as ballistics are concerned, but should not be a problem as long as your weapon is spec'd for 5.56.

I guess my question would be : Why would you mix them?
Because I have a pile of both on hand...223 brass and 5.56 brass, and just a few mags from magpul that are marked for both designations. The rifle is stamped 556/223 on the barrel.
 

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Just don't leave them mixed and loaded for too long. strange things may happen when they are left alone in the dark for long.
Yeah... Like the FN 5.7
 

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Because I have a pile of both on hand...223 brass and 5.56 brass, and just a few mags from magpul that are marked for both designations. The rifle is stamped 556/223 on the barrel.
The mag should make no difference. Either is okay in your barrrel. no/gun or mag stops to think about what round is next as it shoves one in the chamber. Nothing has to be reset for something different.
 

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Discussion Starter · #19 ·
The mag should make no difference. Either is okay in your barrrel. no/gun or mag stops to think about what round is next as it shoves one in the chamber. Nothing has to be reset for something different.

Just wanted to make sure before I blow myself up.
 
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