Well scratch that idea then!
I may reconsider where to take the grizz hunt then, so I can use the wheelgun.
I've considered getting a Super Redhawk Alaskan, for defense, at least that way I'd feel a little safer than just having the .44mag Single action, but I think the guide gun will be fast enough and pack enough punch to keep even the grizzly's off my back if the first shot from the .44 doesn't cure what ails them.
Assuming I decide to hunt where handguns are allowed, what's the opinions on the .44mag for heavy bears?