Thanks Jeff. Rotometals have all my molds in correct for windage sizes. I have a bunch zinc round ball.
The steel Kings balls work good in mortars if you can find them in the correct size. That's the problem no popcan or golf ball sizes. For cannon we don't want steel. There is some concern about steel beating up your bore. The bigger concern is how much steel tends to ricochet when it his something solid down range. It is scary at times.
