Marauder, zing!!
Well ok, I'll play (assuming centerfire only):
Less than 5mm (added a category)
.17 Hornet
5-5.99mm
.223 Rem (Hon. Mention .218 Bee)
6-6.99mm
.260 Remington (Hon. Mention .243 Win)
7-7.99mm
.280 Remington (Hon. Mention .30-'06)
8-8.99mm
.338-06 A-Square
9-9.99mm
.375 HH Mag (Hon. Mention 9.3x62mm - don't see on your list)
10-10.99
.416 Rigby (Hon. Mention .404 Jeffrey)
11-13mm
.45-70 Government (Hon. Mention .458 Lott - don't see on your list)
Guess I'm fairly boring / mainstream