A friend of mine gave me a 3/4 full 5 gallon bucket of lead flakes that he got at an Air Rifle Range.
I started melting it down and have 43 lbs of ingots and I am only about halfway thru the bucket before I ran out of propane.
I did test the ingots with muretic acid to see if they contained any Zinc.
No reaction at all from the acid.
It looks and feels like pure lead , so I may save this stash for my Muzzleloaders
But I do have plenty of Tin and raw Antimony if I need to harden it up for casting other boolits