I can go with the 9.3x74R with QD scope.

I can also go with a .375 H&H (either flanged or belted), again with QD scope if the rig isn't too heavy.

On the unconventional side, I get wonderful use of my J. Winkler SxS in .300 Win. Mag. with QD scope. Yes, .300 Winchester Magnum. This rifle is regulated for 220 grain bullets. It is very accurate and very deadly. A joy to shoot and super easy and cheap to load for.

I know, everybody can now pile on because I have mentioned a couple of high pressure and rimless cartridges (oh shit!). I realize you must harbor your opinions and your notions, so for those that abhor these things, feel free to keep on hating them. I just know that these things do work, and they are imminently useful. I can say in all honesty that if I suddenly had to part with every double rifle but that .300 Win. Mag. I would still have a dandy rifle to use for most anything in North America.

Other contenders worthy of mention would be 8x57JRS and 9x57R. Undoubtedly the latter is one of the finest cartridges ever chambered in a DR. A pity it's been out of production since 1945. With a .358" bore and sufficient chamber clearance in the neck it's a joy to load for. You can use 8x57R brass. I use .444 Marlin brass appropriately necked down.

Yeah, I know. You wanted everybody to just name one favorite cartridge. I just couldn't do it. Sorry.

Curl