I think people have given some good insight as to what calibers would be good and it seems you have a good collections of calibers. I have heard stories of hunted bear that when processing the bear they found 9mm rounds that didn't even pass through the bears fat.
Another thing I would suggest to go with the correct caliber gun is finding something on bear sounds. I wish I could find the episode of this show on sportmans channel for you to watch but I cannot. They went through a ton of sounds bears make and what they mean from feeding sounds, to I don't want to hurt you just leave me alone sounds to you better not take one more step or I am going to shred your ass. One sounds I remember that you cant mistake is this jaw clapping sounds bears make and it doesn't mean the bear wants to play.
These sounds can be early warning as to what might be down the path.
"If you love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that you were our countrymen"
-Samuel Adams, 1776
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