[Calamari]

http://www.biggameinfo.com/BalCalc.aspx

At 800 Yds.:

In a 50 MPH cross wind the bullet will move laterally 35.9 Ft

The bullet's drop from the muzzle if fired level with the ground would be 85.1 Ft.

The elevation correction from a nominal "zero" of 500 yards would be 15.8 Ft.

Play with the calculator in the link using different assumptions. The output is given in inches and clicks

[Calamari]

correction At 800 Yds should be at 900 Yds.

[RANGERAIRBORNE]

I used this calculator, but got no answer for lateral correction (not surprising, since there no way I could find to enter the wind direction- only the wind speed. Perhaps that refers only to the component of windspeed at right angles to the direction of bullet travel?)

How did you get your lateral drift figure?

[RANGERAIRBORNE]

"The bullet's drop from the muzzle if fired level with the ground would be 85.1 Ft."

Don't want to start another whole argument, but the vertical drop of the bullet is dependent ONLY on time-of-flight- which in our example is just about 1.2 seconds, and the gravitational attraction of the Earth (9.8 meters/sec/sec).

Therefore, the vertical drop could not be much more than 35 feet or so- regardless of any other complicating factors.