72 MOA takes it to a mile. The PST was able to do that with the 67 MOA available up, plus 5 MOA on the reticle.
I'll zero it tomorrow, so I'll know how much "up" I've got left after that, but I'm assuming I'll zero 20 MOA below the mechanical zero, which means I'll have 87 MOA of elevation remaining. That'll get me to 1880, then it's just a matter of getting a 40 MOA base so I can get 107 MOA of "up", which takes me beyond 2000 yards. And that's about as far as I think I care to take a .243 105gr bullet
