I know too many Hunters that have bought and shot the 300 Win's and ended up selling them (for a lot less money than they paid) and buying a Rifle that was easier on recoil and shell prices!
Its not always the size of the Caliber but the Accuracy and shot placement in the Hunter/Shooter.I'd look at the 7mm-08,.308 and even the .270 WSM if You want power and speed in a Rifle!