I've loaded lots of BP shotgun shells. I've always used fiber wads - the plastic ones will melt and stick in the barrel leaving a real mess to clean. BPI and Precision Reloading, among others, sell fiber wads. I believe they come from Circlefly.com. I use to buy the right from CF, but believe Craig quit selling to individuals. Find some paper shells if you can, they look so much more period correct, especially with a roll crimp. I don't like recoil so 1oz loads with 70 to 75grs of 3F work just fine. And it helps with the price of reloading supplies. Same load for my old 10ga SxSs.