I'm pretty sure that second one is a .577 Tyrannosaur. There's a whole series on youtube of people in that same room getting knocked on their a$$es by that gun. [media]http://www.youtube.com/watch?v=-EVqT3XEzss[/media]
I had to save a few of those 577 T-Rex clips, they're just too funny. Even for close range elephant I think those would be a bit much. Plenty of hunters have taken them with 405 Win and 458 Lott.