I just read an article "The Perfect Zero" in the Nov. issue of Outdoor Life. I talks about sighting your rifle in so that you will hit the vital of the animal your hunting out the maximun Point-blank range. Example from the article .270 Win with a 130gr Silvertip shooting at a 10" vital the Max PBZ is 352 yards. That has a point of impact at 100 yards of 3.9 inches high. Do any of you sight in for this. Whats your opinion? I've always just held high on targets of longer distance.