Sorry but I think the bear may fall on you and kill you while he is laughing so hard at having a .410 anything pointed at him. I’m not sure if shooting one in the eye with a .410 anything would kill a bear. Given your two options I would go with the 629 with some of Garrett's 629 safe loads. Given different options I would go with a Ruger Redhawk 4 inch in .45 Colt with one of the 300 grain loadings.