I suspect the new .338 Federal will gain a small, but faithful following as well. My buddy just bought one for his youngest son, while his wife shoots a BLR in .358 - even to shooting a black bear inside the garage that was eating the dog's food.
: That 51mm case is a good one for a variety of calibres. It would also make a great B.C. moose/bear gun in .375, just to have a few rifles on the same case. 270gr. to 286gr. @ 2,300fps would be just A-OK.