I had a box of these Hevi 3.5-1.75-6 shells laying around and wanted to see how they would do.
I got 120 hits in a 10" circle at 40 yards. Hardly Earth shattering, but these shells are capable Turkey killers at 30-40 yards. The Indian Creek choke has an E.D. of .660" and my barrel is 20" long.
(http://im1.shutterfly.com/media/47a2dd39b3127ccefff06ac46b8000000030O08AbtG7Jm2buQe3nww/cC/f%3D0/ps%3D50/r%3D0/rx%3D720/ry%3D480/)