Sure you could choose one of the many cartridges listed above, the same ones our Grandfathers used, .243's, 257 Roberts, etc. Or you could use these new 6.5CM that everybody is talking about, or you could go full retard and shoot some belted bastard that could damn near put an antelope in orbit. But If you really wanna be cool, and cut the wind with scorching BC's, or even if you just need an excuse to build a new rifle, You should go with a 25 Creedmoor.
Load it with the 131 Ace from Blackjack, and you'll dance right past all the 6's, 6.5's and especially those old 10+ twisted 25-06 and Bobs.
I'm coldboremiracle, and I approve of this message.