The question, which is being dodged, is round bottom vs. flat bottom lube grooves on Keith style bullets.
I am still looking for a body of knowledge to back up claims of undefined para-normal shooting feats. It is impossible to evaluate such claims, so they must be disregarded. Anecdotal accounts of who did what, fails to impress me or just about anybody else around here that has been painted as "uknowing". I am also unimpressed with cell phone pics of targets.
When somebody turns in this kind of performance in a registered Cast Bullet Association match with ten shot groups, witnesses and scores, I will pay attention, very close attention. In other words, I will believe it when it is printed in The Fouling Shot.