Like I said, I don't know how he did the shot. It seems doable, whether he actually did it or not.
I read somewhere that the Coriolis Effect is nothing to consider until past 1,000 yards and this was supposedly based on data gathered from the Army Proving Grounds at Aberdeen, Md. I could be wrong in my information.
Where would I find that 1,500 yards is the barrier for considering Coriolis Effect?
I have not and am not shooting that far. So, in my ballistics app, I am not even turning that on.
I had watched some of his Sniper 101 series and he was not actually teaching anything, just mentioning concepts.
I do know that he gives training seminars. Our illustrious host, Frank, even went to one. He felt that Rex spent too much time on internal ballistics rather than the practical solutions of getting someone on paper. That is, Frank was saying that worrying about charge weights, etcetera, is fine but a shooter gets better by learning to get on target and that is a physical thing ( I am paraphrasing.)