FWIW, this is a 12 gauge "good" slug I took out of the shoulder of a bear we had to put down.
No major bones were broken on the broadside shot. The animal loped off and laid down. Two bullets from a Colt Carbine, both 300s moving at close to Casull revolver speeds, striking the shoulder area into the length of the animal, penetrated about three feet and exited out the belly.