Just playing with the calculator- A 6" dia round piece of lead, 24" long, looks to weight in at 271#. That would be a solid pour w/ lead calculated at .40# per cubic inch! (Pipe weight not included). I pour sinkers, jig-head etc for fishing, using melted wheel weights. I use a larger (borrowed) propane pot from a plumber friend to melt them, skim the floating steel clips and debris, and pour them into ingots for future use in a small electric melter with a bottom pour valve. Caution! Do it outside with a breeze! Nasty, Nasty fumes at least till you get the relitively clean(?) lead in ingot form. With scrape prices, I don't know if tire shops are saving them or not. It's been a few years since I've tried to get them. ~Scotty