Would go on an 18" .308 gas gun pushing it out to 1000yds. I have been saving money & saving for almost 3 years now for my dream scope. A S&B 3-20x50 non-ultra short, but they hardly ever come up for sale. The Nightforce comes up for sale far more often. If you have experience with the 2 and don't mind sharing, please explain why you would choose one over the other.