I got a 100 pound batch of "medical" lead. But after having casting and coating some boolits I have strong doubts about how pure it is.
To start with, at 500 degrees about a third of it is melted; at 620 degrees it's all melted; at 700 degrees it runs like water. The boolits take a long time to cool off and they are very frosted. I think my thermometer is okay, but have no way to test it without buying another.
The boolits weight is right on the money, but the alloy is too soft to reliably go up a feed ramp sometimes and other times it shows signs of being really brittle.
I'm sure it's an alloy, but I don't know with what and the ratios. I might be the lucky idiot that found a bunch of linotype and didn't know what he had.But it's giving me conflicting signs. I'm going to test hardness tomorrow with my new Lee Lead Tester.
But if this doesn't work does anyone know where I can have the composition of my lead tested? I don't mind paying for a lab if they can tell me exactly what it is.