Like you, I too load black powder for 16, 12, 10, 8, and 4 gauge. I use plastic shot cups for hunting almost exclusively. I can go 15 to 20 shots before I need to clean the plastic out of the barrel. I can testify that plastic definitely patterns better than cardboard and felt wads. Velocity is also more consistent. In a 10 gauge I I have to cut 3/4 of the petals off of the wad to get everything to fit. I load 105 grains of swiss 1 1/2 with #6 and English 7's. That is my go to pheasant load and it drops birds with authority. As an added bonus when you shoot a round of skeet with black powder it wakes your companions right up!