Either 10mm or 357SIG. Both are good for self defense against the most likely animal or human attacks. Both work well in light rifles or carbines and are adaptable to hunt a wide range of game in either pistol or rifle. (If only there were enough carbines for them!) Both take up less space than .357 Magnum (not that the 357 Magnum's ballistics have anything wrong). English Wanna kill these ads? We can help!