The Grand Slam scopes have turrets with 1/8 MOA adjustments, but no vernier scale, so you don't know if you've wound a whole revolution up or down. I bought a 6.5-20x scope, hoping to use it at long range, but have put it on a hunting rifle instead. Pity - good optics and adjustments.
Ben
I've a 6*20 and a 3*10 Grand Slam and I think they are very good . Could do with some target knobs on the larger one . The adjustments are execellent and very repeatable .