I started to bring up an example similar to this but a slight few just don't seem to hear. Glad you said it.
Proves once again......the more one practices, the luckier they become. Better to be lucky than good.....but, always prepare well so one is good when luck don't show up.On the topic of killing bears at short range - For years in the Ontario Museum in Toronto, there was a skull of a big black bear with a tiny hole between its eyes. An Indian boy about 8 years old was checking the family trap line, and carrying a little single shot rifle loaded with a .22 short (for minimal damage to a pelt). Going through a dense berry patch he surprised the bear and it charged. He shot it from a few feet away, hit the only thin spot in the bear's skull, and it dropped dead at his feet.
For consideration, a slug is a single point, 00 buck is a pattern even close. Miss the critical point with a slug, ricochet off the side of the armor -like skull. May not have second chance. With a pattern one has more opportunities to get that golden pellet up the nose, along the nasal passage into the brain for a lights out terminus Maybe why many alternate slugs and buck.