With a BP load, a little lube ball separated from the powder by a wax paper disk, or a thin BW wad cut from Bee Brood Foundation (as Curly already does), then the other wads and the ball(s). The reason for the lube barely separated from the powder, is to allow the powder charge to melt and spread the lube over the bore to keep the fouling soft.
It works.
From the late Paul Mathews book "The Paper Jacket".