The Pirates wanted some display cannon balls. My first thought was 3" wooden balls in a stand. I sold them one stack of 14 wooden balls.
They were too expensive.
Then I remembered I had a ball mold.
I have been casting concrete balls with it. The pirates want another stack at almost half the price of the wooden balls.
They turn out pretty good. I mix 50% Portland and 50% sand. It has to be able to pour so it is pretty wet. I can cast one ball in the morning and one in the evening.
The cement has minor shrinkage on top of the ball. I cut off the sprue and grind it round.
If they are stacked with the good side up it looks pretty good.
Do you think these could shoot from a 3" bore? If I remember correctly, my mold makes 2.92" balls. These weigh almost exactly one pound.
Zulu