Yes I have read the Darwin awards.
With all do respect, casting lead in a plaster mold is very feasible, when armed with the proper knowledge.
For example Google “lost wax casting” it?s a method artist use to cast metals like gold, silver, aluminum, brass, and bronze. Basically they make a wax model of the part they want to cast, and then make a plaster mold from the wax model. After the plaster has set, the melt the wax out and then dry the mold before they cast the metal.
I have cast a lead bulb using this method.
Let me say this first, do not, try this at home, unless you are going to use the proper techniques.
Make you bulb plug, I used wood turned on a lathe
Make the mold using plaster, there is also special concrete like substances used for this
Ok this is the important part. The mold must now be dried. Some people will do this in an oven at home, but I went all out and did it just like an artist friend told me. I let the mold set in a dry place for a week. I then took it to my friend who has a kiln in his basement, and he finished the drying process. Ok this if from memory so bare with me. The temperature in the kiln was raised slowly, 50-75 degrees per hour, and every 200 degrees, or so the temperature was held constant for 2 or 3 hours to allow they entire mold to heat up. This continued until the kiln reached 1100 degrees I think. The
Temperature was held there for 48 hours, and then was slowly allowed to cool down.
I think all together it took 5 or 6 days to dry the mold.
My friend helped me with the casting, as he was skilled at it. In the morning we put the mold in the oven and heated it up to around 550 degrees. In the afternoon we took the mold out of the kiln directly outside to the center of the yard and cast the bulb.
When the lead and mold cooled down, the bulb came out and it looked like it came out of a milled metal mold.
So basically what I’m saying is yes if you don’t know how to do it properly, it can be dangerous. But if you are armed with the proper knowledge, it might be the best way to get what you want.