I am looking for data to load bismuth shot over biodegradable wads. 12 ga, 2-3/4" card over powder, fiber filler, like in the 1950's but with non toxic shot and modern hulls and primers. I have old load data for fibre /card wads, but nothing for bismuth and the hulls and primers are all different from the old books. I am tired of walking my property and finding old plastic wads from previous hunts or target shooting sessions. But I can't find any data for what I want. Suggestions please?