I've poured about 50-100 sabot out of a new lyman mold for 20 guage sabots and they just aren't up to par. Kinda wrinkly and some voids. Got any suggestions? I tried the heat on the furnace from half way all the way to the hottest. It's a steel die and I've cleaned it a couple times trying to improve the situation. I haven't shot any of these yet.