I've used the 70 grain BT for prairie dogs many times......they work quite well and are quite accurate.....but I agree....the "mist" factor doesn't match some of the 22-250 performances. They shoot with less drop of the TNTs as well.....but weren't necessarily more accurate. I thought the TNT had a slight edge in "mist" but nothing I've used matched the 55 BTs at close to 4,000.
I know you want 70 grains and up.....but out to 250 yards the 55s really do the trick!
