Don't forget 8x64S. Here's one for sale in a Mannlicher-Schoenauer. Same as very popular 7x64 Brenneke case but necked up so it's easy enough to tweak the M-Sch. magazine follower and offer the 8x64S as another option.

http://www.vdb-waffen.de/gebrauchtwaffen...mp;Kategorie=52

The 8x64S is a close metric copy of the .30-06 and, on a hunt in Germany a few years ago, the gamekeeper there, Alfred, was using this classic caliber.