My thoughts: lets say he has KK, AA, AQ, QJ, JT, KQ. then your move is great cause he very well might call, and you have the winning hand. If he has a flush and or straight draw, I think that this is wrong cause you do not give him a reason to make a mistake and call a smaller bet. if he has QQ, JJ we are fucked. if he has AK then atleast we have outs.

I would bet that if he had QQ, JJ, KK, AA then he would have re-raised preflop so most likely this is not in his range. Many would raise AK as well preflop so I would assume that is not in his range That brings us to AQ, JT, QJ, or some crappy draw, air. With these hands I think u want to keep him in the hand and not fold against such a huge reraise. So I say make it 280 forcing him to go all in on the turn and or river. regarless I want all my chips in the pot.

Disclamer: I am still playing 50NL