IIRC, there's barely a difference in percentile rank between 520 and 525? Maybe 93rd vs 95th percentile? (I don't have my histogram before me to know.)
Unless you are explicitly instructed to retake the exam, don't be crazy. Know that you have a strong chance to get a lower score, and with some schools averaging your attempts, you'd be foolish or be considered a fool.
(Somewhere there is a game-show analogy I can apply in this context, but Press Your Luck doesn't really fit as a good analogy to me here. "I already have $50,000 accumulated after my third Whammy, but I have 3 more spins...")