Two elk hunters and a guide engaged a charging grizzly bear with a 10mm GLOCK, a .45 pistol, and bear spray.
Carl Mock was fatally attacked by a grizzly bear outside of Yellowstone Park, near a populated area. He deployed a full can of bear spray.
A grizzly bear attacked archery moose hunters in Wyoming on September 7, 2010. A FOIA request revealed the story.
A grizzly bear attacked an elk hunter and his guide in 2005. They responded with a crossbow and a .44 magnum. The guide was injured in the attack.