I don't have any load data, but I do have the TC 20 gauge rifled barrel on a TC encore. My scope is a Leupold Vari-X I, 1-4x. My best groups to date are 1" at 50 yards, and just under 2" at 100 yards. My barrel has a very strong preference for Winchester Supreme ammunition. Doesn't care for Lightfields or Federals or Remingtons as much.