We don't have the bear issue...if I was to shoot a koala bear I'd be sad. But yeah, it's a great round for that and 9mm isn't. It's horses for courses I guess, and the right choice must be made...Sadly, many do not either buying too much or too little and having to re-buy. I've picked up many firearms in this way, from people who got the wrong thing for their needs.
10mm...Nice. I've fired a few and liked it. Lolled at boat anchor!
It's a straight blowback 10mm. No delay cam or lever. No locked breech. Just mass and inertia to contain the pressure.
It's not a firearm I think I'd ever own personally, but the 10mm's I operated were effective, of that there is no doubt.