The problem is not that it won't kill a bear, it will. The biggest problem is that bears don't always go down on the spot and are difficult to track without a good blood trail. Their soft feet really don't stir things up much so unless there is snow it's hard to follow foot prints. They have very long hair and a lot of fat which clogs up the bullet wound quickly. In short: big diameter bullet equals good blood trail, small diameter bullet equals difficult if not impossible tracking situation. Make sense?
