Well, I was keeping out of this, having never hunted in North America, but if we can interpret this as my favorite hunting calibre from North America, it could very well be the .338-06. Bit more wallop than the .30-06 when heavier bullets are loaded, and similar performance with similar weight bullets, given that I am talking actual hunting, not long-range sniping!

Bit like a .318 WR with modern easily-available components.

In terms of general usefulness, and the bulk of game taken in Oz with North American cartridges, it is the .308 Win by a country mile!

Ok, ok, I know this is the "Hunting in the Americas" forum so back to you guys.....