This video is a little dark at first, but it clearly answers your ".50 BMG vs deer" question.
I watched a guy gut-shoot a deer with a 30-30 once, and it looked about the same except for the instant drop. Seems like someone with a high-precision sniper rifle should be able to do better than gut-shooting a little tiny forked-horn buck. Digging up a 2-year-old thread to post BS is ridiculous. Gimme a break.
Where is the "barf" emoticon when you need it?