The Oryx is a premium bonded bullet that I have full confidence in for large animals. I have used the Oryx for shooting moose, elk, kudu, gemsbok, and giraffe. I would use the Oryx if hunting bear. the Vulcan is meant for very quick kills by opening quickly and expanding violently. In your 9.3mm it would still likely be a good bear bullet because it is so big and heavy. But it's designed for quick kills on driven European game that weights half of what a big bear does, wild boar and fallow deer for example.