10mm will stop bears, in fact it's fast becoming a popular bear carry calibre in Alaska. Its considerably more energy than a 9mm, very similar to .357 mag but without the recoil.
Don't take a 9mm though as many do, way underpowered although there are tales of people dropping them with 9mm (there are also tales of people mauled to death with 9mm! General concensus, underpowered).
....<snip>... That's one of the reasons for the rise of 10mm in Alaska. Low recoil.
Another good bet is a shotgun with slugs but not exactly concealed carry!
I've always fancied the 7.5fk. But not possible in the land of the unfree. Also, the teddy bears don't usually charge over here.
Yup-- I have a rifled slug barrel for my 12 gauge Rem 870-- but weight is a big factor there for me, thus my questions about Bear calibers. Everyone going will have bear spray-- no exceptions. We will likely have 2 or 3 guns along as well, but our best defense really is the size of our group-- so far at 8 and possibly up to 12 by the time we do this.