You know how I know you don't know what you are talking about? This right here:
It's usually easy to tell if the wind is doing a different dance at varying ranges to the target.
That is why there are so many 100-10Xs at 1000 yard shoots. Oh, wait, there aren't. The X-10 ring of a 1000 yard target is ~20 inches across.
High master Long range shooters, who have been shooting for decades, get the wind wrong, regularly.
You know how else I know you don't know what you are talking about? This:
And yes, not every day has a full value wind gusting 10-20 mph. On a "good" day, these 1000 yard shots are not overly difficult.
Sure, on a reasonably flat, surveyed range, with wind flags, a spotting scope to read the mirage and a couple of sighting shots. Next time you find a pig tied to the pole holding up the wind flag, at a surveyed 1K yards, knock yourself out (assuming you have a good zero at that range, with similar weather, at that elevation).
Even with a 338 Lapua (250 gr @ 3000 fps) if you take a poke at a pig you think is 1000 yards away and it is really 980 you will be off in elevation by over a foot. With a .30-06 it is over 2 feet.
If the 5 mile an hour quartering wind you estimated is really 7 mph from 55º, you windage at 1K yards goes up from 23 inches to 36in. (Again with 338 Lapua, .30-06 will be more)If you are lucky you miss, if not you end up with a gut-shot cripple that will starve to death, because you will have a hard time even finding the spot where the deer was standing after hiking the half mile from where you shot.
Please tell us again how "easy" it is to tell the difference in a 5 mph @ 45º from 7 MMPH @ 55º net wind across 1000 yards.
Oh, and guess what, Ballistic calculations are not always correct. They are usually good enough to get you on paper for elevation, but on paper at ~1000 is a long way from good enough for a game animal.
Shooting a game animal from that distance is unethical. You may try to justify it because some assclown did it and you saw the video on youtube, but that is meaningless, because it was unethical when he did it too.
Rationalize it all you want, it is still unethical.
You want to shoot an animal that far away, go hunt Prairie dogs. Pretty much any hit with a rifle capable of getting out that far will be dramatically fatal to a small rodent.
Just because your equipment and/or ability is not up to the task is no reason to belittle those that can...
You shot my rilfes have you? Have I competed against you? My equipment is perfectly capable, as is my ability. My experience, basic ballistics knowledge and common sense is why I say it is stupid.
Read the other thread.