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

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