I'd just sight it in at 100 yards and click up from there. It's not terribly hard to stay in a K zone out to at least 500.
For M193 @ 3,200fps with a 100 yard zero it's +1MOA to 200, +2 more MOA to 300, +3 to 400, 4 to 5 and 5 to 6.
Pretty easy to remember, right? Most guys can't shoot within a minute from a field position anyway, so this is even more accurate than most can hold even if you are off by 75 yards.
Last edited by Tyrone; 10/03/18.
