Might be worth as look at this U.K. site
http://www.claygame.co.uk/ as they produce data sheets for all sorts. Data sheets don't cost much postage wise and lots of U.S. reloading components find their way here. You should be able to work something out from the mass of available data. I've lots of data for Alliant/Hercules powders; it's just that the wads might not be available. One load that might be a starting point is a Red Dot load suitable for 2" chambered guns as tested at the Birmingham Proof House. Any parallel tube case plastic or paper 19.5 grains Red Dot Win 209 or CCI 109/209 primer card and felt wads and 7/8th. ounce shot. Just adjust the wad column for the 2 1/2" case and you have a nice 7/8th. oz. load with very low pressure. As I say, if you can't find what you want on the above website just e-mail them and they may be able to make suggestions. Advantage being that all the worked out loads are Proof House tested. Lagopus.....
