When you have your lead in the pot melted, flux it good with bees wax and a long nose lighter then scrap the slag off it. Dip the corner of that LEE mold into the molten lead. When you can pick that mold out of the lead, tap the handle with a wooden stick and all the lead falls off the mold back into the pot, the lead is hot enough.

Wrinkles are the lead is not hot or the mold is too cold. So put more heat to it. Glad the mold is working for you. I'd sure hate to have a lead ball that big flying at me.