With my factory 10/22 Collector #3 and factory T/CR22, I am capable of producing 1" groups or better at 50 yards with certain ammunition. (10/22 trigger "broke in" from gritty 7.5 lbs to smoother 4.7-4.8 lbs and T/CR22 trigger went from over 6 lbs to smoother 4.5 lbs ... Which I think contributes heavily to smaller group size vs new/unbroken in trigger) Just prior to my cataract surgery this week, I wanted to see what I could do with "dirty" barrels with 3000 rounds shot through 10/22 and 1000 rounds shot through T/CR22 without cleaning the bore (before I cleaned them to do another "myth busting" dirty vs clean 22LR barrel thread ... I will probably capture "dirty" groups with other brand/weight bullets for reference). These are T/CR22 test groups shot with Aguila 40 gr CPRN (Aguila Prime) at 50 yards while zeroing the Bushnell 6-18x50mm scope (It was very windy day that kept knocking over my target cardboard and I am blaming the left hole of bottom group to wind ) - https://www.thehighroad.org/index.php?threads/thompson-center-t-cr22-real-world-25-50-yard-22lr-ammo-comparison-break-in.864241/#post-12075377 These are 10/22 test groups shot with Aguila 40 gr CPRN (Aguila Prime) at 50 yards while fussing with scope and mount moved from T/CR22 - https://www.thehighroad.org/index.php?threads/real-world-plinking-25-yard-22lr-ammo-comparison-with-hot-barrel-ruger-10-22-collector-3-break-in.859106/page-3#post-12075744 And this was my "practice" shooting for the challenge with T/CR22 before the cataract surgery. Hope I do better after eye surgery recovery, especially with KSA 16.5" bull barrel and Burris 6.5-20x50mm scope (Don't ask me what happened with the 1" circle ... I have no idea what happened ).