I shot trade gun for a lot of years, and found that felt wads were an ongoing problem. I finally went to cork wads, made from discarded wine corks. I sliced the corks into 1/4" pieces, spun them down in diameter if need be with a homemade fixture, and a sheet of course sandpaper stapled to aboard, and dabbed a little hot venison tallow on the back of each one. My load was powder+ .125 nitro card+ cork wad+ 1 oz. shot+ overshot card with a small cut in the edge to keep it from compressing air. Never use Crisco, its like using maypom. Never soak any wads in lube, it turns them into a bullet. When I used wads I used a thin wad that I had just barely touched one side into a hot tallow mixture. The tallow wads worked in larger gauges but proved worthless in anything under .20 gauge.
Hungry Horse