They are all labled 2 3/4" 70mm.
The black Royal Steel 36 IS a rolled crimp over a plastic shot card.
BigJimP, that's what I was looking for! I just didn't know how to ask the question.
I'm starting to really like Rio's shot shells. The big black steel one just made me think 3" mis-labled as a 2 3/4". The brass does add to the effect.
As far as I know, no one mfg's 3" upland bird loads... I'm sure it could be done at home.