That pretty much mirrors my experience. I had the bright idea to make silver bullet necklaces, and started out with an RCBS 230gr double cavity .45ACP mold. I melted a couple silver quarters in a small iron crucible with an oxy-acetylene torch. Even with the mold preheated darn near red hot, the bullets were wrinkly as heck, and the sprue plate wouldn't cut the sprues. I wrecked the sprue plate in the process, and discovered that the shennanigans warped the mold blocks too. So much for that folderol!
