I imagine a logical extension to casting boolits is to look at casting fishing weights so I'm hoping to get some pointers from those that cast the bigger stuff, 3+ pounds.
I have been working on the equipment. The pot is a mild failure. I wanted a bottom pour, got a hold of a 6" ID 8 1/2" tall 1/4" thick pipe. I modified and installed a Lee bottom pour rod and hole, enlarged it a bit. The fail is two fold; the skinny design doesn't lend itself to soak up heat as well as a wider design, it takes a whole lot more heat than my unassuming cast iron pot. The other problem is that it tends to drip, which is not such a big deal. I may need to engineer a better burner for it.
The real "I'm going to hurt myself" fail was the burner. I got a jet burner which gets hot enough, and I installed a chute for the molten lead to travel into the casting area. Fail number one: The chute gets red hot; as in hot enough to vaporize lead... Fail number two: I built it with square tubing, and many other places that get close to red hot are also prone to get the occasional lead splash, which also looks like it could vaporize lead...
I'm putting the bottom pour pot aside for a while, I'm throwing away the ill conceived burner setup, and i'm going to work on a better burner. Before I do that, for those casting big fishing weights in the 3 to 15 pound range, how do you do it?