Well no-one seems to want to go with the .303

so...
I still reckon the 8mm has got all the bases covered for the one rifle sport hunter. You can can take your pick of bullet weights and speeds (8x56R, 8x57, 8mm-06, 8-338, 8x68S, 8mm Remington, ...) and if you could cope with hunting with a cartridge younger than yourself how about the .325WSM ?