What do we really know about the transonic zone?

[Don McDowell]

Not quite sure how a fella could pull it off, but a real test on whether the so called trans zone and shock waves are the culprit for good at 8, bad at 9, and good back at 1000, would be to shoot all 3 targets with the very same conditions. That would help to understand if it's a matter or stick placement, bullet length, or unseen wind/mirage shifts/vortexs, sun height/anlge and temperature humidity variations at the various ranges.
I have seen that bullet length/velocity plays a huge part in good shooting, same with stick height and body position behind the gun.
There's also a good deal of difference in a bullets flight between slick sided patched bullets , and the noble grease groove.