RE: Indian Creek Choke tube
Yeah, the Hevi-13 3" 2oz #6's or Hevi-13 3.5" 2.25oz #6 loads really shine through this joke as well as the Winchester Xtended Range 3" 1.75oz #6's, and Winchester Xtended Range 3.5" 2oz #6's.
Which Winchester load are you using?
What do you mean when you say it is patterning strange?