Before I switched to a 410 I used super bantam 20g with a Carlson (not sure on restriction). I shot the #7 heavy weights before the long beards came out for the 20 then switched over to those. It patterned great with both but the long beard #6 actually were better than the federal 7's on a pattern board for me
Is still have quite a few hevi shot and long beards for it but sadly I only have 3 federal heavy weights left. I killed 5 toms with it, the furthest was 35-40yard closest was 12yards