Question for you really long range shooters, how do you determine the quality of the animal your shooting?
I often glass out to 500 yards using Ziess 10 x40 but at any further distance it is tough to tell the quality of the animal escpecially in low light, or maybe my old eyes are just not what they should be. The longest kill I've had on a deer was 250 yards and that was doe so all I needed to determine was size and antlerless. I've only hunted elk once but was prepared to shoot 300 to 400 yards perhaps a little further but I had both cow and bull tags.
Not sure how you protect from ground skrinkage at those long distances, I see a lot of hunters miss judge deer inside 100 yards.
I stick with shooting pigs, audad, and axis doe at long range. I probably wouldn't try a trophy animal at extreme ranges. I passed on a couple of very nice axis bucks (I think) at almost 700 yds for that very reason. In retrospect I should have shot one of them, they're thick as peanut butter on our place.
Mountain lion @ 725. Couldn't range it until after the shot as he was quickly getting further away. 300rum green box scirrocos. On the same hunt I shot my bull elk @ about 10yards. The right place @ the right time.