I was shooting about 4 weeks ago and I was guessing the range about 300 yards downhill. I was hitting pretty good at 6 power on my Vari-x 2. Sunday went to shoot 100 yards and could not hit a 18" tree end. Shot at 30 yards and was about 3" high. Went back to 100 yards and shot at the bottom of the tree end and I hit at the top of the tree. So I was about 12" high at 100yards. I have a 26" barrel and a 210gr XLC barnes and 2980fps. My question is what was I sighted in for? I was good at longer ranges but way off at 100 yards. I can't find the correct tables in my reloading books.