............so we all agree that that you would ruin an aluminum mold.
Brass will fuze to an iron or steel mold, how do you think they repair cracks in cast iron?
So we all agree that you would ruin a steel/iron mold.
Your left with casting bar stock and machining them or lost wax casting bullets and then machining them.
Then I would explain to you why its easier to turn in the brass for scrap and buy lead.........or maybe I just did.
Sorry to burst your bubble, just trying to save a man from destroying a mold.