Table 1. Wind Drift of 7 mm Remington Magnum Ballistic & Environmental Assumptions:Bullet – 7mm Remington Magnum with 160 grain bullet (Federal Premium Vital Shok with Barnes Triple Shock X-Bullet)
Ballistics – Bullet B.C. = 0.508, muzzle velocity = 2,940 fps
Scope Height = 1.5 inches
Zero at 200 yards
Wind 20 mph @ 90°
Setting – Elevation 5,600 feet, 60°F
Download the free Ballistics Calculator from Point Blank
Note – Point Blank calculates 10 mph wind drift, so double it for 20 mph wind
Bizzy.........Here is a copy/paste that has very little to do with your beloved 7mm Weatherby Mag. I'm sure with a little work you can get more accurate numbers that may prove to be eye opening.