Crazy Cryder

Doc, several have mentioned ballistic products wads. Specifically I would look at the SG16S, it has the shortest oal with a hollow cup design that would allow for the extra room you will need. Personally I would try 60gr. (Vol) of 3f and 1 oz of 7.5 shot as a starting point. I shoot a similar load (1 1/8 0z) in my 12ga that cleanly takes game. As you most likely know don't be afraid to put some crunch on the wad, black loves compression. Hope to shoot with you soon. Crazy