Got back from Holiday. Couldn't keep wifey up another night participating on this forum with my phone. She is very patient with my shooting, but has her limits. (big grin here) I don't have anything to add to what has already been said, except I have tried to push bullets with a slightly higher BC toward the ranges you asked about. I found that with no wind they were pretty good out around 700, but when the wind picked up they were blown around just too much.
Shooting 180 gr Bergers through my 7 Rem Mag, BC .659, is another animal. These cut the wind far, far better.