I got my hands on some herters "h" decoy anchor molds and have poured quite a few of them. The process I have been following is warm the mold up on top of the Lee metal melter as I am melting the lead. I then fill the mold 3-4 times to continue getting it hot. I then pour the lead moving the mold around so that the lead gets into each corner etc... I then tap out the anchor and into a bucket of water to cool. I have been melting down old fishing sinkers, some mushroom weights, etc... Days later the anchors are still very soft and bendable. Am I going about pouring these incorrectly?