Originally Posted by Mikecr
Litz/Berger did do a 'mythbuster' on the elliptical swerving notions. It only happens within feet of muzzle release and ain't causing decreasing moa, or anything else -decreasing.
Mikecr is right. Litz did debunk this myth fairly adequately in this article.
The OP references the URL (Bullet Dispersions
) which states that...
So, if the Swerve component is on the order of 0.25", it stays at this level, or gets slightly bigger as the bullet goes down range. If you keep the Jump error small then this is what you will observe, a 0.5" group at 100, and 0.5" at 200, etc. Here is where you can see that the MOA can actually decrease at longer ranges. The group size never decreases, but the dispersion in terms of MOA does. A subtle but important difference.
Litz also cites McCoy who was referenced in the URL (Bullet Dispersions
) and does a good job of putting McCoy's work back into perspective as that particular URL takes it out of context.
Yes. Epicyclic Swerve exists.
No. It's not enough to cause decreasing MOA or group sizes at longer range.
However, as others have observed, decreasing MOA at longer ranges can occur due to other factors such as parallax adjustment.