Back when I needed to produce a lot of bullets quickly, I would use two or three 2 cavity molds. If they were not all the same, I made sure they were visually different to make sorting easier. For example, three 2 cavity molds produced a lot of 148 grain dewc bullets in a short time. If I wanted variety, a 45 caliber rib mold, a 45-250 SWC and a 32-100 SWC. It was no fun trying to sort 44-240 SWC, 45-250 SWC or 44 rb and 45 rb.
I also used two 20 pound bottom pour melters.
That was before I discovered 6 cavity molds. I am not sure which produces a faster pile of bullets. The
Kevin