My 9.3x74R double is my favourite double, but I have plenty of friends with the 9.3x62 and one who has a 9.3x64 which has plenty of power for deer.
I think the germans got it right so many years ago to get a good size cartridge that can fit in a standard action or a very slender action for doubles with plenty of power, great sectional density bullets with a recoil that allows a lighter outfit.
Whilst some will wax the lyrical about 375H&H as the bare minimum for DG I generally find other than the occasional trip to Africa the average Joe Blow is better off with a calibre that they can use every day for deer hunting without brass or projectiles sending them broke.
The rifle that springs to mind as a very nice outfit is the Tikka Battue lite in 9.3x62. For something that has to be carried for hours, yet light and packing a punch its hard to beat. Very popular with our hounds crews that spend hours walking through thick scrub. Cheap, tough and reliable. Did I mention accurate?
And if you can find one, the ole pumpkin chucker 9.3x57mm lol!