I have to emphatically agree with RYEWSKY25284. One only has to look at the hind quarter depicted in the Varmint Hunter's reply, and you will get an appreciation of what a bullet had to contend with as it tries to get with some momentum and weight to the vitals of a bear. This fat is in addition to the hide, hair, and probably bone that needs to be penetrated with authority. I have killed only four black bears in the Idaho and Washington Mts. mostly at distance; but since I hunt alone, I can't afford to have them run down a canyon or get in the thick stuff so I use a caliber that will hopefully anchor them at the distance that I shoot, which hasn't been longer that about 300 yards or so. I also shoot with a bullet that will penetrate the front shoulder on its way to the vitals to break them down if possible. Finding a bear shot in open country is one thing; finding it in the berry thickets is another. I have encountered a lot of hunters coming out of the mountains saying that they probably missed the bear on couldn't find it that I can' t imagine how many bears have been wasted or worse yet were wounded and left to die a miserable death. The bottom line is that most of us do this for a hobby or fun and end up killing a critter that spends every second of their life trying to survive. So I believe they they deserve the most humane death we can inflict.
By the way this forum is so interesting in that it reflects t;he many situations that a variety of hunters have encountered. For example CVCOBRA1 is right in that he has heard that the natives in Alaska like to use the 223 for hunting. I don't know about the native people in Alaska, but I have hunted with the Inuits out of Nunavut, and they use the 223 for the caribou and wolf, but not for the polar bear. At times they said that they would like to use something bigger, but cash is sacred, and they don't need to kill the critter on the spot. The ice goes FOREVER.
You'll have to forgive me for all of the dialogue as I have been coped too long, but we have just started this journey with the virus, but keep up the posts. It is very interesting to read about all of your experiences.
But I want to take this opportunity to wish all of you and your love ones a healthy journey during this trying time.