The revised list revised yet again; there are now 33 calibers:
5.6x57 RWS
.243 Win, .244 Rem
.257 Rob, .257 Wby
.264 Win
6.5x54 MS (aka 6.5x53), 6.5x55, 6.5x57, 6.5x68S
6.8x57 Chinese
.270 Win
.280 Rem
7x57, 7x64
.308 Win
.30-06 (aka 7.62x63)
7.65x54 Arg
8x56 MS, 8x57JS, 8x60, 8x64S, 8x68S
9x56 MS
.338 Win
.358 Win
9.3x57 (Rumored)
9.3x62
9.5x56 MS (aka 9.5x57)
10.75x57 (Rumored)
10.75x68
.400/.375 H&H
.458 Win