Back in the early 60's the recommended bear gun in Alaska for fishermen and hikers was 12 guage loaded with slugs. Some recommended a #6 1st up to blind the bear and bloody the nose so you could finish with the slugs. At 10 yds #6 really does not open up that much so you better be a really good shot. The 44 mag was the big pistol at the time and got some people killed because it was not enough. As the movie said, "I kilt the bar but the bar kilt me". A 12 gauge slug has 2x the power of the 44 mag. With some shot rounds in your pocket, it also made a good survival gun.
Newer guns have come out since then like the Marlin levers and the very big cartridge revolvers are examples.
Some of the guides were carrying African doubles. They had to protect their client and needed something that would knock the bear down. The 458 WM made things a little simpler.
I was told to go for the shoulder.
Patron Member NRA
"I would not be an old man if I had not been an armed young man." JTJ
I was taught to respect my elders but they are getting harder to find.