Wouldn't it be easier to have a revolver on your hip for self defense against bears and lions while doing photography? I just think it would be hard carrying a shotgun around the forest while you are taking pictures. Just my opinion.
If you are set on the shotgun maybe you could use dragons breath instead. I'm sure a bear would run away from a flame coming at him. And/Or get caught on fire and burn the whole forest down.
Ammo not to have for bear and lion defense:
Rocksalt
Flechette
Macho Gaucho
Pepper Blast
Confetti
Actually, just have a look for yourself: http://www.firequest.com/exotic-shotgun-ammo.html
If you are set on the shotgun maybe you could use dragons breath instead. I'm sure a bear would run away from a flame coming at him. And/Or get caught on fire and burn the whole forest down.
Ammo not to have for bear and lion defense:
Rocksalt
Flechette
Macho Gaucho
Pepper Blast
Confetti
Actually, just have a look for yourself: http://www.firequest.com/exotic-shotgun-ammo.html