http://www.paintballforum.com/forum/showthread.php?p=1278078 #post1278078 says it all
Recommended Barrels:
Whatever works
Strengths:
Decent Price, no breakage, smallchance of chopping
Weaknesses:
Really Bad for Windy Areas
Review:
I got half a case of these to go play and tried them on .688 an .689 barrels (all i got) and well they shot pretty nice up to maybe 35 or so feel but any more than that they curve like mad due to the wind. But thats not the paint's fault.