I heard the best defense against any bear is that “you don’t have to be faster than the bear, just faster than your friend”
I know a guy who had a guide on Kodiak Island who followed that rule!
He survived, barely, his final shot at arms length finished the bear.
But he was so PO’ed that the guide had to stay in hiding until some other folk came along.
ALWAYS recheck your scope before going afield, your baggage handlers will not be the ones at risk during your bear hunt.