I have to agree with Larry. Newton you're putting too much into how far off the lands the bullet is seated. Unless you're shooting competition benchrest don't be so anal about it.
You're going to get that wind drift no matter what material the bullet is made from. With two comparable weight bullets, and BC's, one cast and one j-word, but the j-word is at much higher velocity, then the j-word will have less wind drift. This is due to it having less time in flight to the target. The faster you get your bullet to the target the less time the wind has to act upon it.