223 vs 5.56 brass?

[wwillson]

All,

I have a bunch of mixed .223 & 5.56 brass. Can I size and trim all of the brass and use it interchangeably in my AR?

Thanks,

Wayne

[Arkie_Lefty]

Yes. Accuracy and group size will be better if sorted and shot by headstamp though.

Also, as a rule 5.56 is usually slightly thicker/heavier. Thus slightly less internal capacity. When loading to MAX, you should work up loads separately as pressure may climb beyond acceptable levels as much as a grain sooner in mil spec brass. Then again, this holds true to a lesser extent with different commercial brass also. I. E. Win vs. Rem vs. Fed. etc.

Bob