Larry,

Visit the Alliant and Hogdons Powder web sites for loads and related information. There are a number of recipes for 2 &1/2” RSt/Cheddite hulls. CAC Associated in PA has been a reliable source for Alliant powders and Claybuster hulls. Take a peek at 16 gauge society web site. There is a reloading forum. Many of us use Gulandi wads and DR-16s. BP has Gulandi, DRs have been scarce for last few years.

Best of luck.