I am completely new to casting boolits. I guess this falls into the right forum. I want to make 40mm Zinc pushers. They are kind of rare to buy and expensive. The molds seem to be none existent. I have some time and want to see what I can do.
I am thinking of machining out a mold to cast them. The Zinc pushers are approximately 1-5/8" in diameter with a hollow point on the bottom and the top. My theory is to make them sit sideways in the 2 halves of the mold. I am thinking to make the molds out of steel, because of the higher melting point of Zinc. Does this sound reasonable? Do you think they will cast well horizontal?
When you cast a boolit, after everything is cooled, can you drop a boolit in the mold and does it fit perfect? I am wondering if the mold is slightly oversize? In other words is the mold made to exact specs? or oversize?
This is what the pushers look like if you are not familiar.