If you can Squat 500, you should be able to power clean 225 for more than 1 rep (i'm just throwing out some numbers here).
If you can clean 315, you are one bad ass mofo.
(If I remember reading correctly, Jim Wendler can't clean 315, that is a goal of his. So, that may give you a frame of reference. He can squat 600+ raw, deadlift 600+ raw, bench 400+ raw and I know he can Military press 225 for reps.)
I'm training the DL tomorrow, I'll do some power cleans as part of my warmup. If I can clean 225, then I'll let you know.