Hello all.
Here is an update. I have an 8-bore round ball mold ordered from England, and an 8-bore hollow base conical mold from Accurate Molds. However, both are many weeks away from arriving. So, in the meantime, I improvised a homemade mold of my own. Below are a series of pictures showing my process. I hope to test my bullets later this week. Range report with target to follow.

http://www.buckstix.com/buckpics/8-BORE-MOLD-000.jpg