We just hosted the Inaugural NT Big Game Rifle Championships in Darwin, and there were 9 doubles in the gunrack. No two were the same chambering! Only one was a 'modern' rifle, a Kreighoff chambered for the 9.3 x 74 cartridge.

The rest were all Brit, namely:

H&H Royal SLE in .375 Flanged Magnum,
Jeffery BLE in .400 3-inch,
Rigby boxlock in .350 Rigby,
Greener boxlock in .577 x 2 3/4 Light Nitro,
Tolley TLH in .500/.450 x 3 1/4 Magnum Express,
Rosier ULH snap-action .500 Express,
Webley & Scott BLE in .32-40,
Tolley sidelock in .500/.450 N0.1 Express.

What does this tell you?

There were plenty of interesting bolt-guns too, including a 10.75 x 68 Mannlicher Schoenauer and a 1903 6.5, a Rigby .275, a Westley Richards .275, a Savage 99 take-down in .22 Hi-power, and a Scheiring break-open single-shot in 7 x 65 R (plus the usual .338s, .375s, .416s and .458s).

Needless to say, a good time was had by all!

Here's some of the hardware: