Lawnboi
WKR
Add wind. A 6mph rifle at 750 yards…. 1mph of wind is changing poi more than .1mil. It takes no time for your cone of fire to get quite a bit bigger.For most hunting rifles working perfectly, with great shooting, the best ammo, in the most stable position, and with no wind is going to be about 1 MOA. So for the 750 yard shot discussed, you are giving up 7.5" in variation just in the cone of fire from perfect shooting with a perfect rifle and perfect ammo. That leaves extremely little room for error.
My main practice is an 8" kill zone assumption. I shoot and practice on a 8" plate backing up further and further until I'm no long consistent in field conditions (wind, shooting of pack, seated, etc.). That is my max range for that position.
IMO once you hit the point where your mph makes 1mph make .1 mils things become a lot more difficult