ATK, Blount, Speer, Omark, CCI are all the same company and are in my home town. A buddy of mine had the engineers out there look his bullistics over, sent that info to leupold. Maybe he was just lucky, but he got great results and I've seen him kill coyotes at over 700 yrds. His scope dial is right on the money. When you are talking about 1000 yards, I don't know anyone who is going to let me shoot at his house to figure my bullet drop. Thanks to all you guys who have helped me out on this. Good luck this season!