^^^^What he said. People get so hung up on bigger is better. A 30-06 will take about any big game. The only reason I would ever consider using a 338 or 375 would be if Griz were in the area, then you need that knock down power in self defense.
I shot a bull moose three weeks ago with my 30-06, 220gr. Thing dropped like a 1,000 lbs bag of cement. Granted it was shot only 30 yds away.