I'm no professinal shooter/hunter, but for the life of me I cant understand how a hunter could mess up a shot on a bear, I would practice and do all imaginable under God to deliver a lethal hit, those sombitches can/will kill ya if you shoot em and piss em off.
I OWE it to the Guide as well as the bear NOT TO CAUSE ANY DAMN PROBLEMS.
And, I know you wouldn't show up with a .243 or a .270...
I think a guy who can really shoot a .375 would be an ideal client. Otherwise, maybe an '06 with good bullet choice would be just fine.
I wouldn't take my .375 if I couldn't shoot it well (and I can)...