Today after I finished shooting at a local indoor range I was talking with the owner and was able to obtain a small amount of range scrap from him. It was about 15lbs as that was all I could get into the container I had.
I already rendered this down and I have to say this stuff was very dirty. And I have to say very dirty, I haven't weighted the ingots yet but I'm guessing it to be about 40% scrap. While working the stuff into the alloy and while scraping out the jacket material I found a lot of powdery material. Even after fluxing a few times and while I was pouring this out into ingots there was a lot of this powder. Enough that I left about an ingots worth in the pan I was using so I didn't contaminate the ingot.. This powder was almost black and was about the consistency of talcum powder.
Is this normal? I will try to get actual weights after the ingots cool.