There have been a few bear maulings in the Cascades over the last 20 years. They happen in the spring when the bears come out of hibernation, get pushed around by the bigger bears, and are just plain desperate, hungry, and used to fighting.
Then you are better off with bear spray cause while you are being mauled by a bear there is no telling which way the bullets will fly.
Oh, and don't bend over in the woods without a quick look around.