This is lead recycled from the "softest lead" commercially available. BHN ~5-6
If you are a Black Powder Shooter this is what you are after. The only thing softer is laboratory grade 99.99% (BHN ~4)
We now send the plumbers lead in the small 1 pound and 1/2 pound ingots.
 
California p65 warning
https://www.p65warnings.ca.gov/fact-sheets/lead-and-lead-compounds