I think I would lean towards calling here. If CO seems really loose and you think there's a very good chance he'd call you with a weak ace or a smaller pair or whatever this push might be ok, but without a strong read I wouldn't push here. I don't think the 250 in the middle is worth risking your stack over since I don't think you'll get called by any hands you beat (AJ, TT, etc.) enough to make this truly profitable (I'm assuming you'll have an edge later on in the tournament around bubble time). I really don't think reraising here to 300 or so is a good idea, building a big pot out of position with a vulnerable hand against loose opponents sucks.

Oh and if you could list the buy-in and how villian got all his chips earlier that would be helpful.