My Mk ll has the Simmons 22 mag AO 3-9x32 sitting on it....not a bad scope for the $ for this rifle and "my" shooting.
I zeroed this gun with CCI 40gr hp subsonics and at 50yds will group clipfuls pretty much all touching using a bipod and me doing my part as it should be done.
I also have shot a variety of other ammo, and most all grouped good enough to make the grade. But the standard velocity and subs definately grouped the tightest. High velocity was a couple inches higher as expected.
Did have had some magazine issues with mis-aligned loading and bullet tips jamming the edge of the chamber, had to bend the mag lips a bit to get the proper alignment, also applied a couple pieces of tape to each side of the mag to take out some of the looseness when fitted into the rifle.
Hope you get yours shooting to your liking.