While most shooters keep their shots well under 500 yards, extreme long-range shooters are well-versed in the myriad of variables that come into play putting lead on target out to and past 1,000 yards. Generally speaking, most shots under 500 yards t only have to account for windage and bullet drop, but past 800 yards things start getting tricky.
Gunwerks has been kind to break-down the Coriolis Effect, which simply put, is the world spinning and the bullet wanting to fly straight. This phenomenon has to be accounted for or bullets will miss by as much as 4″ to the right or left (depending on your hemisphere) if one were at the North Pole.