That may be the story I’m remembering, it’s been a while.
It is a remarkable story. I will ping it to the group, as it seems relevant for the discussion of shooting grizzlys with .22 rifles.
Bella Twin shot a world record grizzly with a .22 in 1953.
http://gunwatch.blogspot.com/2014/11/what-22-rifle-did-bella-twin-use-to.html