Black bears kill more people per year than grizzlies- probably because there aren't that many grizzlies around. I know I would sure prefer meeting a black bear. One thing, black bears are very directional, once they start in a particular direction they don't like to change course. Last fall I was coming back from my stand for a P.M. coffee and ran into a bear- there are a lot of bears where I hunt and I'll always see tracks and maybe a bear about every 5th day. They are protected and have lost some fear. In any event as I was looking at this bear I began to realize how big it was, a really wide, flat face and little pig ears and I was probably staring at it too long cause it started popping its teeth, etc. I backed off about 40 yards and figured it wanted to keep on its route and that's exactly what it did, which again was sort of a thrill as this bear was close to 500lbs with a big raised rump. Pretty darn cool. Almost all other bears I've encountered will run. I had one follow me but it had a radio collar and was probably a problem bear.
In any event- I wouldn't worry too much. Like others I've heard a bullet- unless a brain shot- isn't going to kill a bear immediately- he can still chomp on you- the bear spray is supposed to be better.