I was going through some ammo from this past hunting season.
I got to comparing the size of mixed loads.
One that got my attention was a box of Rio Royal Steel 36 #2's. They are labeled as 2 3/4's. I put it next to a Win 2 3/4 #1 Buck, Fed 2 3/4 #8 and a Rio Game Load 32 #8. The Rio Royal notably larger.
Here's a picture of them:
Please let me know if you can open the link.