If the bear is close enough to be sprayed with bear spray, you ought to have already put 2-3 rounds into it.
You are wasting valuable seconds only to find out it won't work...
No doubt!
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"