have did a limited info search using black powder in plastic hulls and wads. so far it looks like black powder burns at high temperature and causes hull and wad plastic to breakdown ect. have never reloaded with black powder and it looks like a fresh start in components and maybe even reloaders equipment may be in order. anyone out there ever run black powder thru a MEC, P-W, Spolar, or any other progressive shotshell reloader ?