It depends on the handedness, mostly. If you switch to center-handedness it's more accurate, but you can't see which gun you're holding (hand 0, 1, or 2 to set the handedness). The balls do shoot up a little, but that's to compensate for the arc, otherwise you'd have to aim way above people to hit them -- over the right distance, the balls should hit pretty much dead on the crosshair.
