I have seen where another guy did this with his gun, so I figured I would post up my setup as well in hopes that it might be helpful to other forum members.
My gun is a mossberg 535 with a 20" polished barrel, and a JH .660 choke. Load is 3-2-6 hevi-13 at a measured distance of 40 yards.
I hope this helps some guys who might be starting out with this gun. I get over 180 in a 10" circle with this setup.