222, 223, 22-250, 220 Swift, 243 Win, 6mm Rem, 257 Roberts, 25-06, 6.5x55 Swedish, 270 Win, 280 Rem, 7mm Mauser, 7mm Rem Mag, 30 carbine, 7.62x39, 30-30, 308 Win, 30-06, 300 Win mag, 303 British, 7.65 Argentine, 8mm Mauser, 348 Win, 35 Whelen, 375 Win, 45-70, 458 Win mag, 32 ACP, 380 ACP, 9mm Lugar, 38 Spec, 357 mag, 44 Spec, 44 mag, 45 ACP, 12 gauge, 20 gauge, 410 gauge
So I guess that's about 38 calibers.