Adjusting for windage?

[Mr. 16 gauge]

O.K., I have a question.....how does one account for windage in long range shooting: is there some means of making calculations, or is it just a WAG (wild ass guess)?

I understand that you can determine the amount of hold over necessary to hit a target at a certain distance based on the bullets B.C., velocity, zero, ect, but what about windage?

Is there a formula, such as "a bullet weighing X amount traveling at velocity Y zeroed at 200 yards needs to be held to the left at Z inches from the bulls eye for a wind from the right at 12 mph"?......something along those lines? Or is it just "I held about 6 inches to the right....because it felt like I should"?

Working on planning a pronghorn hunt for next fall....there are no 'long range' shooting ranges here in MI (leastwise none I can find), so a lot of this 'long range' stuff is going to be based on calculations.

Thanks in advance...........