Gander - interesting. I find my clean barrel shots are high with Pyrodex.I now foul the barrel with 60 grains of powder and a sabot then load the first round without swabbing. For reasons I can not explain, swabbing between each round thereafter keeps my "groups" nearest that first shot.

I still believe there should be a product with which we could "foul" a bore via a ramrod without subjecting the barrel to rust. Oatmeal anyone?