While learning basics is fine for stuff over 700 yard mark takes certain inate skills to be any good over 1200 you need very calm low adrenal shake.
But now with https://www.tracking-point.com/ makes skill a moot point if you have $21,000
In life things rarely stand still for you. Better to practice 300 yards and under moving targets. Most enviroments do not allow for constant long range engagements. There is a reason the final 2 shot to pass the stalk is under 150 yards.