Cobra81: I smelt using the same process as you except i used a rockwell bottom pour ladle, it makes the process much safer than poring from your cast iron pot. I use this one but there are smaller sizes that are cheaper:
http://www.rotometals.com/product-p/...le_bottom5.htm
MrSardonicus: They are called "boolits" just to distinguish them from "bullets" which are typically jacketed.