I've heard a lot of talk about the "best all around caliber." Many people say that the 375 H&H is great for big game but would be overkill for smaller game such as white tailed deer, wild boar, smaller sheep, ect. However, isn't overkill only in reference to shot placement? Why not rely on head shots for deer, boar, ect when hunting with a 375? In Alaska (as I'm sure it is in many other places) we tend to go hunting for big game and, if we have no luck, shoot smaller game on our last day of the trip. Many times we truly DO have one rifle that needs to be an all around caliber. If you don't see that grizzly or that elk, deer or dull sheep it is (depending on your tags and where you're at). Thoughts on this?