I'm in my second year of casting. I started out with a LEE 10lb bottom pour. After getting a six cavity, the 10 was too small. Plus my pot seem to only run good between about 2 though 8 pounds of alloy. It was either running too fast or too slow.
I just got a LEE 20lb bottom pour. I spent the morning casting with a couple two cavity molds. What I notice was the lead temperature stayed much more consistent. I didn't have to stop to add metal and wait to come up to temp. I was in the groove for a much longer period of time. My production was increased. My boolits look great and seem very consistent.
The only down side is the spout is a bit hidden. I was able to get used to it.
Live and learn. Now I have two pots!!