I have 2 tubes of pellets through it since rebuild (about 80-100 shots, not keeping close track on shot count). Scope doesn't focus well at 30 ft, although it claimed to focus to 30 ft. Still it's as good as my old 4x scope and this one is pretty good even at 10x at 30 ft so its OK. Anyhow.. groups: Keeping with the JSB Jumbo RS... between nickel and quarter size offhand (30 ft in the garage, 5C about). There is some vertical stringing which I believe is mostly due to power drop if I cycle too quickly. Good news is the pellets now load smoothly, and I haven't seen any of the high-left flyers I was getting before the rebuild. The whole operation is much smoother as is the trigger. Can't wait till the family goes out so I can shoot down in the basement (20C).