It is kinda of a David-Goliath story. In that the woman knew the anatomy of the enemy and limits of her weapon so well that she placed the bullet in the small (maybe 2-inch circle) where a .22 could kill such a massive bear (giant). Was not a “lucky shot” but a deliberate kill.
Precisely correct.
In addition, she was very close and expert in using a weapon she had many, many years experience with, in killing large numbers of creatures.
She chose the time and place of the encounter, was prepared, and had the element of surprise.