I did a pretty good read on how amazing maturebucks are when it comes to being double lunged and just how far
they can go and I agree 200 yards any deer can cover pretty quickly. Mature bucks need to survive are in a class by itself. So it does not surprise me on this. Now your young bucks and does usually give up pretty easily on a double lung. I will find this article today and go more in depth if you like? (Deer & Deer Hunting mag)

T