Yes, there is nothing to keep the ball from pitching and yawing like a football or taperd bullet, leading it to just tumble. Plus if using a hop up like dust said, the rotation would be negated or the hop up would be negated, you realy cant have both. Try firing a gun with the hop up on upsidown. No doubt the guys who thought of this had good intentions but they havnet seemed to gain much support from the end users.