My apologies for being repetitious, but here goes. The simple solution is to stop carrying cushion wads. I read V. M. Starr a few decades ago ant tried his advice by patterning a 12ga percussion and a 20ga flint, both cylinder bore single barrels. My patterns got better while my loading got simpler. Starr recommended using nothing but thin over shot cards. you use two over the powder, then the shot, and then one over the shot. He also recommended loading both powder and shot with the same measure. That gives you a slight increase in powder with an increase in shot weight.
There's nothing to lose in trying it. You can always go back to buying cushion wads, lubing them, trying to figure out how to carry them, and then keeping thick overpowder cards, cushions, and thin overshot cards all organized in your hunting bag and pockets. You might think that's fun. I didn't.
