if the winds right you can hit balls 450yards + np.
on my local range the longest sign is 300 yards and about 150 yards behind that there is a irrigation pond.. I've hit balls into it before. they actually gave me my own tee because they were losing balls

Also these are shitty balls. deff. not remax golds.
I just started using a long drive driver.. and i actually lost a lot of consistency . Having problems adjusting to the long shaft and i think i need to get a xxx shaft.
pics are my avg out of 10 swings. sorry for shitty phone pictures
This was with a standard driver with a stiff shaft.
with the long drive drive i hit about 25% of my balls outta bounds so i'm still very sketchy with it. though they go anywhere from 40-60 yards deeper. my swing speed goes up to 136.
http://i1107.photobucket.com/albums/h388/eric_mcc/Untitled1.jpg
http://i1107.photobucket.com/albums/h388/eric_mcc/Untitled.jpg
Though i hit it deep my best round is 68 i shot this in high school. i'm a 76-79 player. and trust me I've been beat MANY OF TIMES by kids who drive 250 yards..
tough to make good contact when you have a driver that's over 45 inches. I think long drive drivers are roughly 50 inches.