So what are the other 8 mm's?

As mentioned in addiion to the:

8x57J;
8x57JS;
8 mm Rem May;
8mm/06; and
.325 Winchester SM,

there is the

8x57JR;
8c57JRS.

The slightly longer
8x60; and
8x60RS.

The 8x68S and 8x68RS (I assune).

The 8x64 and 8x64R.

The 8x56 Mannlicher.

The 8x56R Hungarian, which is actually .330 calibre.

And I am sure the are other 8 mm Eastern European military cases, I can' think of right now.

There is also the large magnum rimmed cartridge for break open rights, the 8x75RS, based on a necked down 9.3x74R case.

What else?