Whilst reading blogs within this section, I came across some comments regarding melting point of our casting alloys. I later found this web site most informative, listing many commercially available lead alloys listed by the Kester Solder Company. It's going in my "Casting" binder for sure.
https://www.kester.com/Portals/0/Documents/Knowledge%20Base/Alloy%20Temperature%20Chart.pdf