LB: My Vang Comped barrel on my Tac Gun patterns #8 birdy into 7" at 15 yards! That is half what it was originally
00 Buck is 7" at 25 yards. Again, half of what the stock barrel did. With a notable decrease in perceived recoil.
And you've seen what the slugs will do. The barrel mods really made that gun!
The show on TV called "Polar Bear Town" about the Bear Guides in Churchill had every Guide carrying a 18" shotgun.(Mostly 870's) They never really stated if they used Slugs or Buckshot, but I think it would probably be a little of both.
Getting within 100 yards of one of those critters would scare me to death. I'd probably be running backwards for the truck!
Polar Bears are way up the food chain from even the biggest Vancouver Island Black Bears. But I saw a story once of a guy who was trapped on the ice with a bear hunting him and finally killed it with a snub nosed 38, real up close and personal.
Not for the faint of heart.
Randy