I guess my farthest drives could go into 2 categories......field distance drives that I have measured, and course distance drives. Farthest measured field drive.....495 feet. course drive, well, about 530 on two occasions, but I would say that there is a good chance that the course signs were wrong (they almost always are). I would say at least one of those two was legitimately over 500 though (at least my ego hopes so). For me, consistant golf D wtih a Champ Tee-Bird is right around 400, Crush, its about 420, and Surge about 430-440. I have thrown a Wasp Midrange past a 400 foot hole once downwind (once again, questionable course markers). Personally I feel that I can still make some improvements as far as reach back, as well as conditioning (I am a javelin thrower hoping to make it to US championships, and I have a lot of power in the tank so to speak) I have seen a couple shots in my lifetime that might have been over 500 besides my own. I think there are 2 guys at my league in milwaukee who might be able to throw farther than me (once in a while at least, haha).
hope this helps,