In some areas that is all they will allow you to use. You learn to keep your shots under 35 yards.
That is the key, keeping shots under 35 yards. I know guy that will try 70 or more yard shots. :evil:
I also have taken several deer with my shotgun with a slug or my bow that had buck shot in there heads, neck, and back side.
My good friend is a taxidermist and I see a lot of deer that come in and have buckshot all over the deer.
Personally, I would never use buck shot for a hunting situation, I don't agree with it, but like PA-Joe said, there are some areas that will only allow it.