Just read the article in this month's issue of Wildfowl magazine, L.P. Brezny's Ballistics column. Rio is going to market Bismuth loads in 2 3/4" and 3" shells. Found some pricing on it at http://www.cabelas.com/product/RIO-BISM ... 774237.uts
Bismuth is a nice load to use for older guns. It is as close to lead as you can get. I loved using it in my Smith & Wesson Waterfowler. If you get a big tax return or inherit some money, try a box of it. I think that you will like it.