My dad has a spent casing (brass) from a H&H .700 NE "big game" round that his tour chaperone test fired for them while on a trip to the dark continent a decade or so ago. (I think he said it was truck mounted, but offered in a double rifle configuration for the truly massochistic). It was apparently intended for charging elephants in the African bush, which seems to be more of a problem these days since the elephant population has rebounded somewhat (and they have lost their fear of humans, are running out of habitat, etc).

In any case, THAT should be the "bullet award" for the miracle win - especially if the likelihood of a repeat is non-existent (sort of like a "follow-up shot" using the .700 mag. I suspect you'd have a broken shoulder on the first shot.) I think there is something like 19,000 J of energy from that round. The bullet is 1000 grain weight