Smith and Wesson is fine but not for everyone. From what I understand pepper spray wil not stop mauling in progress it is jusy additional incentive for the bear to leave before the attack. I would not dare to try it on the grizzly. After I would like to stick to my "little bones".

When you're in bear country, it's very important to know what kind of bear you may be dealing with. The best way to tell is from the bear scat.

If the scat contains berries and roughage, it is probably a black bear.

Grizzly scat is generally composed of small bones, hiker's bear warning bells, and smell like pepper spray.
That is just hillarious. Especially that pepper spray smell....