I just posted this elsewhere, but figured I'd post here, as well.
I am 10/10 on a 12 inch target at 100 yards using the "1" setting. Nowhere near what I want to be for accuracy (groupings).
My groupings were all left of center, from 7 o'clock to 11 o'clock, a few inches apart, but walking up the side of the target.
Ammo choice at the moment is Tula 122 grain steel cased FMJ. It's dirty, but cheap (?) at $5.25 for a box of 20.