It would seem a .40 S&W will get the job done though it took and entire mag dump. Luckily the intruder wasn't a Grizzly, they'd be packing the homeowner away in a body bag.
Colorado homeowner emptied pistol to kill bear that broke in
Colorado homeowner emptied pistol to kill bear that broke in
Kelly Mauldin had just been awakened by the couple’s barking dogs that didn’t wake up her husband before dawn on Saturday. She walked to the door of the couple’s bedroom and found herself staring at a male black bear weighing about 400 pounds (181 kilograms) — about 10 feet (3 meters) away in the dining room.
In an interview, Ken Mauldin said he grabbed his 40-caliber pistol, took his wife’s place at the door and shot once, aiming for the center of the bear’s body. He thinks the first shot hit the bear and it charged him as Mauldin continued firing.
As he was shooting, the bear got as close as 5 feet (1.5 meters) from Mauldin and then turned toward the stairs leading to the home’s front door. The bear crashed through a bannister as Mauldin emptied the gun and slid down the stairs, mortally wounded.
Colorado homeowner emptied pistol to kill bear that broke in