Thanks magnum wheel, The scope is a nightforce nxs 5.5-22x56 and has 100 moa of internal adjustment and with my 30 moa rail. I get a usable 90 MOA adjustment with a 100 yard zero.
Duzell, to shoot out that far you want a capable cartridge that can shoot that far first. A .308 would be impractical but definitely not impossible, a .300 win mag would be a good cost efficient way to go. I choose the 338 lapua due to it still having lots of knock down power at long distances. Other than that it is just a lot of practice at becoming consistent in everything you do.