Originally posted by Paladin
There is nothing at all mysterious about the forces that act on a paintball in flight. (even though I don't know how to explain it in scientific terms)
The discussion so far has lead to the knowledge that spin does not correlate to where the ball hits down range. The fact that the ball changes direction in mid flight indicates that something, "X", is affecting the ball in flight. If you want to say that the barrel is causing this you have to make a reasonable argument on what it is. We all know the barrel can induce spin but this has been discounted in this case study.
Your claim of seam problems is discounted because shooting round nylon balls of the same weight shows no improvement in accuracy.
We were proceeding down a path that was getting somewhere but we seemed to have stalled as we got closer to the truth.