Painkillers, why are flyers an issue? What are you intending to use this ammo for?
If it is home defense .... lets be realistic ..... what is the longest distance in your home that you have a clear sight to shoot?
10 meters? 15 meters? 20 meters?
My suggestion ..... pattern your guns at that distance ..... and I am pretty sure the pattern is tight enough .... even with "flyers" .... if there are any.
p.s.: I don't see flyers in your patterns of the Flightcontrol ammo ..... I just see patterns. But if I wanted or needed to find flyers .... I am sure I could point them out.
p.s.s: Nobody has defined what a flyer is .... and how you would measure it .... I mean scientifically you would measure the distance of all impact holes .... calculate an average .... determine the standard deviation ..... and determine threshold of what a flyer would be ... and determine the impacts that deviate from that threshold.
I wish we had that 8 pellet load available for testing here in Canada ..... because statistically I am convinced that it would not perform differently than the 9 pellet loads. But that is just my opinion ..... Unfortunately we have no way of testing this without that ammo being available .....