I've seen manufactures printing tables on targets and on ammo boxes; never been impressed.
A head or tail wind, humidity, temperature swings, barrel length, and the slope of the scope on the rifle or iron sight target height...too many variables. Before anyone recommends moa adjustments for another they better have some inside information.
A 2 moa incorrect calculation @ ~800 to 1,000 yards and your spotter will describe your miss in feet units. And remember, we are talking just about gravity come-ups. How would you like changing wind conditions coming from your left?