According to my quickload and Sierra infinity software which I find deadnuts on for my long range shooting, a 250gr bullet with BC of .18 kicking out the muzzle at 1600fps will have 4" wind drift ( 15MPH crosswind) at80 yards and 5.3" drift with 20mph crosswind.

With just about any bullet with BC less than .3, wind is a killer. Bullet wieght does not matter, only how fast you can get from A to B which of course can be contributed mostly to BC and how fast you can get it out of the muzzle.