I bought a used Lyman 4 cavity mold , steel blocks. I tried casting boolits & they came out wrinkled , I smoked the cavities with my trusty Bic , the boolits are wrinkled. I put the mold blocks in my ultrasonic cleaner with Simple Green and ran it through several cycles then washed the blocks in acetone , smoked the cavities again & still got wrinkled boolits. I always preheat the mold not only that but I'm getting wrinkles even after several pours. I've tried setting my pot to high heat , low heat and in between heat. The alloy in the pot is about half & half pure lead/coww with about 2-3% tin added. This same pot of lead will make beautiful boolits in any of my other molds except the Lyman 4 cavity.
Should I throw this Lyman mold overboard the next time I drive across a bridge somewhere ?
Mike