The first thing, There seems to be 3 schools of thought on killing black bears. 1. The first is Destroy the lungs, heart and big arteries and veins attached to the heart. The bear may move a few yards dead on its feet. 2. The second is break the bear down on the spot. Shooting a little high in the shoulder in a broad side shot getting both shoulders and maybe the spine. The bear will go on it nose right where shot. 3. In groups where dogs may be used, Many of the dog owners want a treed bear neck shot so it will not be able to get hold of a dog and hurt it.
I spent 15 years as a Field Game Warden in the mountains of West Virginia, About 40 miles from the Virginia line. I had to kill many a bear in my job. My work rifle was a 308 Win. bolt rifle with 1.5X4.5 scope and shells loaded with 180 gr. Nosler Part. If a bear is shot broad side through the lungs the Nosler Part. opens fast destroys a bears chest. or will break both shoulders and stand a bear on his nose if needed, And any angle shot is no problem.