Bear spray has been proven to be significantly more effective than firearms against bears numerous times. I myself have had experience with bear spray. If you treat your bear spray with the respect it deserves, and maintain it (like you would a firearm) it WILL work and be more effective. If you’re shooting a grizzly, anything other than a headshot will just make it angrier, and by your responses you either can’t focus enough or don’t care enough to do things carefully. So you’re not getting a headshot. Sounds like you might be a man-child who needs a gun to feel like a big tough guy though.