Check post 13. That is also one of my guesses. But I also saw loads fall apart from 100 yards and farther out. I had a Dasher that would shot in the zeros and ones at 100 with an extreme spread of 3 and it would not shoot under 13 inches at 1000. I went and used a load that shot bigger at 100 and had an ES of 8 and it would shoot great at 1000. MattPark ranger said:No one mentioned parallax. That's my guess.