5.56 vs. .223 Rem

[98Z5V]

Pretty good vid.  Breaks it down well.

Once disclaimer, I've cut down cases, between .223 Rem PMC Bronze factory ammo, and Lake City 5.56 NATO brass.  There's less case capacity in the LC 5.56 brass, because the case web and base is thicker than the PMC .223 brass.  I have pics of that somewhere on here, when I did it.  It was when I was developing the .300 BLK loads, and making .300 BLK brass on my own, years ago.  For longevity, over time, the LC 5.56 brass is my go-to for making .300 BLK brass.  The PMC never made it past the 3rd loading, before the bases were bulged, and I'd have to extract a stuck case from the Full Length sizing die...  Which sucks...

Anyway, enjoy the vid: