Are you looking for a Hunting rifle or a Sniper rifle?
If you are looking for a Sniper Rifle I would have to say. Cheytac M200 Intervention .408 Love that gun.

http://www.cheytac.com/Products/CheyTac408.php

But if you are looking for a Good Hunting rifle. I would say A Cooper in a 6.5 x 284 but I like 280 or just good old 308 win.
http://cooperfirearms.com/

But as for the Cheytac I am only recommending it for sport not any thing else.And the Cooper for hunting animals like dear or buffalo that is it.