What did the 10" to 20" ring look like around your 10" circle?
I really like #5's best in Lead, but I approaced the #6 Thugs as a chance to try to fill up a 20" circle, and they worked well for that. I think having a #6 Thug in the Chamber, and a couple of #5 Thugs in the Magazine Tube would be a great hunting setup.