I shoot all three interchangeably. I tend to use my Ruger No. 1 in .338-06 for woods hunting, as it's a little handier and one shot is usually all you will get. Other than that, the .338 WM is my bad weather rifle (it is in a Rimrock stock), while the .300s get carried for general open country hunting. All three kill elk reliably. If I were going for grizzly, I would definitely take the .338 WM, but for black bears any of them would be equally lethal with good bullets.
