Thanks for the replies and the info.

.488 bullets? I thought from the case dimensions that the .475 No 2 took the same bullet as a .470 NE. Is this incorrect? I thought the .470 NE bullet diameter was .475 inches. Where do you get .488 inch bullets?

Ammo availability does appear to be an issue. A Square is listed as having .475 No 2, but I can't seem to find any for sale anyplace.