While it may be “fun” for the person shooting, it is not “fun” for the animal who dies a suffering death.
Judging from the few animals I've seen shot with a 50 BMG, I have to ask, where's the suffering?
They are essentially blown up. Shredded into bite size pieces.
I just don't see where the 700 lb Oryx suffered much with an exit hole as large as you described.
It tore most of the shoulder off the exit side of the Oryx.
A wound that large would bleed out pretty fast, wouldn't you think? You know, bigger holes bleed more and all that jazz.
I don't condone hunting with a 50 BMG, just sayin'...