Just returned home from the range. The new Hevi-shot choke tube .662 did not disappoint. 3-1/2" Magnum Blend shot 199 in 10" at 40 yrds. Hevi-13 3-1/2" with 2-1/4 oz #7s knocked it out of the park with 328 in a 10" circle at 40 yrds. I also tried a Winchester extended range 3" with 1-3/4 oz of #6 and was impressed with 208 at 40yrds. If I were to buy another box of shells it would have to be Winchester Extended Range 3-1/2" with 2oz #6 payload. From what I read the Winchester High Density loads are a bit heavier then Hevi-13. Bottom line is the Hevi-shot choke tube and shells in my 535 Turkey Thug with 20" barrel are a winner. Hope this helps.