Some years ago I shot griz with a 200 grain target bullet out of a .300 WM. I tested it first in metal washing machine drums, then in some abandoned buses deep the bush (nothing illegal). Everything looked ok.
Disaster. The first shot flipped the griz straight over on to his back. Second into him on the ground and he stopped moving. Shook my buddy's hand and looked back and, as the Newfy said, "Dere she was b'y, gone."
The bear was shot by somebody else a week later a km down the road. First bullet hit a rib dead on and flattened out. Second hit the shoulder level with the mid-chest and never got through. I had chronographed the load at 2800 fps.
Very embarrassed. And will never do that again.