+1 on
http://castboolits.gunloads.com/
+1 on the Lyman book. More info than I could easily absorb, including all of the relevant metallurgical study. My book looks like a third grader got ahold of it with all my notes in the margins and every which way!
Probably your biggest early barrier is going to be buying lead and which lead to buy. For a fast moving boolit, you'll need a harder alloy (lead, tin, antimony) and the process you use can make them harder or less so. Go to the Rotometals website to find a lot of what you may want.
The nice thing about casting is the same as the nice thing about reloading: You get to form your own stuff with your own blends of materials to get a result that works best for you. Far better than a generic boolit you get from a manufacturer who has to make thousands of buyers happy all at the same time.
You're gonna have fun with it!
--Wag--