I'm trying to think of all of the "calibers" I've owned...
22 Short
22 Long
22 Long Rifle
22 WMR
32 S&W
38 S&W
38 Special
357 Magnum
44 Magnum
25 Acp
32 Acp
380 Acp
38 Super
9x18mm
9mm
40SW
45 GAP
45Acp
7.62x25mm
10mm
218 Bee
30 Carbine
5.56x45 & 223 Remington
6.5 Carcano
7mm08
7x57 Mauser
7.5 French
7.5 Swiss
7.62x39mm
30-30 Win
30-40 Krag
7.62x51 & 308 Win
7.62x54r
303 British
8mm Mauser (7.92x57)
8x50mmR
30-06
300WM
I'm probably forgetting a half dozen.