I finally got some Fed. Hvy. Weight #7s and ran them through this choke. I got 115/10, 124/10, and 158/10. With the Fed. Hvy Weight #6s and the Carlson's .575, I average right around 110/10 and shot a 135/10 the other day. What do you guys think and which one would y'all use? Has anyone ever shot the Hevi #7s through the Sumtoy 562-5 and how did they perform? I have to say the Federal Hvy Weight #7/Sumtoy patterns were nice and even, as was the Carlson's patterns with the Fed Hvy Weight #6s.