284 yds in my career playing RTS with the regular version of the game..
Over 300 yards if I play using Links 2003 Pro Distances. However, I do not like to play this version because I need to play by clicking.
I also noticed that if you play Champ or Elite, distances are a bit more than playing just Amateur or Pro. I never play below gusty winds. So sometimes I benefit from it, other times my distances are cut by quite a bit.
With Links2003 Pro Distances I like to select specific downhill holes on specific courses(Like Kapalua). There my longest shot (Elite, High wind and waiting for winds to be a tailwind, downhill fairway..) i reached 450 yards... a lot of that was rolling on fairway though.