Or find a guide who agrees that the .300 RUMwill do as much or more to a bear than a .338 WM...
I consider it arrogant to come into a professional's work place and act like you know more than they do.
I seem to recall an oil change being done on my Mustang a couple years ago. The "professional" mechanic (complete with ASE certificates on his wall) had his wrench on the oil pan drainplug, and was pulling and pulling on the wrench, but couldn't get drain plug loose... I had to point out to the "professional" that he was trying to turn it the wrong way... I guess maybe I'm a bit too arrogant...