A friend of mine was party to the taking of a 10ft brown bear as a back up gunner. This took place about 4 years ago on kodiak Island during a road system hunt. The shooter was shooting a 338 , my buddy was shooting an 06. Bear was taken at about 30 yards, and as he described to me the showdown, the bear did not react any differently from the hits it recieved from the 338 WM or the 30-06 all of em were killing him. Bear had lots of holes in and out of him. I said to him ....did you wish you had a bigger gun, he said ....nah, just wish I could reload faster! Bear absorbed 8 shots between both guns at 30 yards and less as they moved in on it. To say that the 300 WM kills better than an 06 is just plain horse chit, having killed moose with both, the only thing a 300 does is give you a wee bit less distance estimating, but with todays bullets.....thats it.