Akratzer25,
You should go check out the castboolits website. If you want to get into casting it's the place to be. There is info there about heat treating, different alloys, sizing and lubing, molds etc. It's also a great place to find sources of lead, tin, molds etc. There's usually one or two people selling some lead alloys there for good prices.
Keep in mind that if you wish to sell your cast bullets the feds require you to get an FFl to do so. If I remember right it's a class 6 but I could be wrong. They want their tax cut.
Hope to see you there.
Triggerhappy