There is NO game animal here in northern-western Canada, that a .30-06 is superior to with any bullet weight over a .280AI, none.

Actually, the .280s-.270 are a bit flatter and kick a bit less and WILL KILL Elk, Moose and Grizzly very nicely using appropriate bullets....as will the .30-06, of course.

You really need a 24 inch tube to get what the .280AI can deliver and also should use 150-160 bullets, IMO.