I don't think I own a mold(gas check design) that I've ever had checks stick properly while sizing? So, my plan is to cast some pure lead from these molds and a friend with a machine shop has agreed to put them in a lathe and drill a 1/8" hole in their noses to put an arbor(no. 8 screw with head removed and screwdriver slot cut on end), use some valve grinding compound and spin them to try and open up the gas check area of molds?
Steve