Common opinion is that the 300WM is a bit fast for typical bush hunting, yet the only real problem with high speed calibres is bullet disintegration. With decent bullets though, that argument loses steam.
The only other argument against the 300WM is its recoil, but with proper technique, and a well built rifle, it shouldn't bother most people unless they're shooting 20 rounds or more, which I trust you wouldn't do while hunting.