The one you suggested is probably as good a choice as any. In addition, you might consider something chambered for the .338 Lapua or the .30-.378 Weatherby. But please note that it is often much more difficult to develop accurate loads with the real large-capacity rounds. I have heard of cases in which people actually shot out a bore before finding a really good load.

Some smaller-capacity rounds can be quite accurate at extreme ranges, but of course have steeper trajectories. But often this difference is not so large.