yes use the federal paper hulls,, they are shunned by most bp shooters becouse you will get very few reloads and then will have a hole in hull.. one shot usually.. blow on the end to see if you youve got a pinhole.. the paper hulls will give less pressure and pattern much better..black powder should start off low pressure and burn down the barrel for best results.. if you have choked barrels and want to use bismuth you can use powder,.. nitro card (12 guage),, ..lubricated wool felt wad( i like yellow tompson center lube),,, and number 4 bismuth for average sized ducks.. this will give you max room un hull for bismuth.. if you have enough space you can put cork between the lubed wad and nitro card to help shells keep longer in hot weather.. as with all lubed shells, lube can get into the powder during hot days.. pack the powder and wads on the press to about 45-50 pounds to get better pattern and lower pressure.. dont pack the shot. if you have cylinder bore youll need to use fiber wad over the nitro card.. make it all fit,,,, and pattern , pattern, pattern.. each 10 degrees will give different pressure, differnt velocity, different pattern.. so if your a cold weather shooter make sure your velicity is keeping upwith the jones.. you can probably go to 3f in cold weather, again no loose powder loads.. id use a chronograph with damascus and use it to figure possible dangerous pressures by watching velocity.. its a poor way to go about it but safeer than nothing.. ive killed a lot of ducks, jump shooting them with 16 and 12 gauge flintlock with number 4 bismuth, close range and probably below 1000 fps in below zero weather.. but you have to know your pattern at the temp your shooting. with choke it wont be as much of a problem as with cylinder bore... good luck dave..