what was the caliber? a grizzly skull is pretty thick...
Yep. I knew I wouldn't be employing the weapon unless and until the animal was on top of me, literally. I've had, compared to most, extensive experience with bears, at home and on trips. Many false charges, chasing them out of camp at night, when called for, surrendering to their whims, and incidences of mutual respect initiating mutual withdrawal from situations. Most of the time, they want out of the situation of an encounter more than I.
Like any big animal, you can't count on a stopping shot to the front or top of the head.
I'll say this - you seem to have led a very interesting life.