CanadianGunNutz, HuntingBC.ca, you name it. Any firearms related forum always has discussions regarding wilderness self defence. I'd personally recommend HBC over CGN just because from my personal experience with it there's a whole lot less BS and more down to business. Just my personal preference I guess, but I never really enjoyed their forum (I find its like the Pirate4x4 of the Canadian gun world, GREAT for learning and reading info but brutal as hell to fit in with, guys are pretty stuck on their own thing). HBC's still a little cliquey but they're generally good guys, and they're local. Just my .02 though.
Those Mossberg 500 JICs are very good self defence weapons for their cost. Buckshot will kill a cougar no matter what if you connect with it, they're fairly thin skinned. A lot of guys who hunt them use .22s or .17 HMRs to drop them. I don't mess around with predators either, if I'm going to go to the point of shooting an animal in self defence I want to know its not coming back after me - and that means killing it unfortunately. I hunt, but I personally hunt for substance. I don't shoot animals for sport or the thrill of it, and I don't shoot anything unless I'm taking it directly for meat or my life is in direct danger. I also don't give warning shots generally, if I've made up my mind that the predator is enough of a threat to warrant shooting it, it's getting shot and its going down. Thats just my personal stand though, many guys have different convictions. Cougars don't get warning shots from me either, period, because I've learned enough from them that if you see them then they are directly stalking you with the intent of finding a way to take you down. Bears, on the other hand, if you see them and they're not acting aggressive, its because they're either only checking you out or they haven't noticed you (or don't care about your presence). I will sit in a berry bush with a well fed blackie and share the berries with him because far more times than not he's not interested in you. I've done it several times. I've also stared several bear down face to face (once in Yale less than 10' away) and we both went our own way... rather quickly lol. Yes, some bears are aggressive (grizzlies and sows/cubs especially), but most times they'll try to avoid you too. There are exceptions, and because of those rare exceptions I do carry a firearm in the bush, and I don't mess around with buckshot on bears, they just get slugs from me.
That all being said, by and far I have had WAY more issues with asholes in the bush than rogue animals. Unfortunately, we're not allowed to shoot them because some of them do deserve it.. Animals understand that humans are superior, and usually treat you with enough respect to avoid you. Some humans, on the other hand, have no respect for anyone or anything and will cause trouble with other humans just to satisfy their own egos. I just try to avoid them at all cost because I have better things to do with my time than to deal with asholes. LR