I saw a fairly new model pickup the other day. The guy had used about half of his endgate to write out in big block letters" Better to have a gun and not need it than to need a gun and not have it." Man I love the place I live. Anyhow, this applies to handguns for bear protection doesn't it?
Ive read some of the reasoning behind the suggestion that bear spray is a better idea than a big gun for defense against bears. It strikes me as biased based on an anti-gun agenda. Pepper spray has a lot of advantages for self defense. Still,police carry pepper spray,tasers AND handguns,and keep a shotgun in the car. Whenever I look up information on bear spray I see all sorts of strained reasoning about how a gun is only going to make things worse and how bear spray will smite the shaggy beast like the hand of God. I have to agree with the poster that suggested that your not going to be able to "trigger the flee response" in a bear that's protecting its young for instance.
I used to have a cat and she had kittens one time. We left her with our neighbors,who we later discovered was abusive to animals (had I known,I would have never left her and the kittens with them,later they got a dog,a larger breed and locked it in a 4x6" cage in the back yard and beat it when it would not behave) We came back and the grandmother had deep bites and 1/4" deep scratches all over her leg. We could not find one of the kittens,and they were very defensive about it,until we insisted. We found it cowering under a dresser,claws dug into the floor ,and refusing to come out. Its pretty clear what happened. They did something to the kitten. Maybe it hissed or bit when it wanted to be put down or something. The mother was not happy about it and probably came over to help and the old lady probably tried to kick the mother cat,and the cat apparently decided to jump,dig in the claws and start biting and scratching.
The moral of that story is,this was a very friendly house cat,and most cats have an instinct that when attacked or threatened by something big,they run and hide. Throw kittens into the mix,and she tried to take the old woman's leg off. You would not think a 6Lb (yes,she only weight SIX pounds,she was very small) house cat could do very much damage,but it was quite severe and required a trip to the ER. Just the amount of blood was rather shocking. (They chased her into a room and called animal control who came out after we had her back,and when she saw the friendly little purring six pound tabby cat,she asked "What did they do to her?" She did say it was the first cat bite call she had ever responded too. Cat bite wasn't really a good description though. It was more like a cat mauling)
Now think of a 500Lb predator defender her young. No amount of pepper spray is going to trigger a flee response. The more dangerous you seem,the more shes going to try to kill you. She KNOWS how this works. You driver her off,then you eat her children. Shes not going to stop until one of you is dead.
My opinion is,bear spray is great. Everyone should have it. Just like the police officer that carries multiple options to use on a BG however,you should have another option in case the bear spray does not work,or if the situation is such that it just wont work. Suppose you stumble across one and the rain is being driven by gail force winds right into your face. I seem to remember some sage advice I heard somewhere about streams of liquid being sprayed directly into the oncoming wind.