ORIGINAL: KodiakArcher
Sorry, but option A ain't going to cut it where really big bears live... in the rain and wind. I'll take option B every time and this is one of those cases where bigger is definitely better; if my finger doesn't fit down the bore, it ain't big enough (.450 or .500 Alaskan)!
I know several people that have been mauled though and every one of them will tell you that it just doesn't matter. You're not going to get it out in time to do anything with it anyway. Option C: curl up in a ball, protect your head, and hope for the best.
This is my only real problem with option A. Not all days are still and sunny. Granted I know the stuff will still spray in the general direction you want it to but I'm sure some (if not a lot) of it will be deflected by the weather........I know a "big ole slug" is not.
What happens if the day your luck runs out the rain is coming down sideways?? You gonna trust that spray is all going to go where you want it to? Plus, I believe you only have about 6 seconds of spray time. With a firearm, you can always reload. I bet it's not a comfortable feeling to have successfully sprayed away that big old Grizzly but now your out of spray....and you're STILL out in the middle of nowhere perhaps with a few more trips to get your fresh kill out??
Yeah....I'm packing a gun too.