A practical choice I guess and in no particular order of preference would be would be the .338 Lapua, .338-378 Wby; 340 Wby or even .330 Dakota, if wildcats can be included how about including the .338- 408 Chey-tac with 300 grain bulets

Possibly the larger .300 Magnums (300 Ultra Magnum; 300 Allen Magnum or even .338 Lapua/300) would also prove sufficiently flat shooting with the 200 plus grain bullets to adequately get the job done

For my own part I have a .330 Dakota which is happy with 250 Partitions at a modest 2900 fps but works to all ranges I will ever need.