Check out products from Track of the wolf. Use the links page here to find them.. They list the components and recommendations. Use a .135" card wad over the powder. You need to measure the bore of both barrels before ordering card wads. Your barrel may be 13 ga. or 11 ga. Get the right sized wads for the gun. Don't guess, and don't order 12 ga. componenet just because that is what is marked on the barrel.
I use a 2 3/4 dram load( 76 grains) of 2 Fg powder, a .135" card wad, then a lubricated cushion wad, then a overshot card wafer( about .10" thick, then 1 1/4 oz shot, then an over shot card wafer to hold it in. I use #8 shot for clay targets and #5 shot for hunting. I can lower the shot amount to 1 oz for skeet shooting, using #8 shot. I lube my cushion wads the night before with a solution of water soluable oil, liquid detergent, and hydrogen pyroxide. You can also use mineral oil, or olive oil, or mix either with a detergent, and beeswax, heated to make a thick soft lube to rub on the cushion wads. Put mine in a sandwich sized plastic bag to take to the range. they don't dry out that way. With this wet cushion wad, my gun stays one shot clean all day long. Only on very humid days do I find I need to run a dry patch down to get out some of the moisture and crud between loadings. Always clear your nipples with a fine wire, and then by firing some caps off, then checking the barrels with clean patches to see how much grease and oil are still down in the chamber and the channel running to the nipples. If your gun has spent any time standing upright with oil in it, you probably should pull the nipples out, and flush with denatured alcohol, and dry before reassembling to shoot. You don't want oil in the channel because it may be too thick to burn out cleanly. Then your gun stops shooting after a few round have built up dried crud to block the channel. If this happens, the work begins. You almost always have to stop and get some hot water down the barrel to dissolve the blockage. Avoid this problem by cleaning out the oil before you go to the range.