A few weeks go I smelted a pot of clip on wheel weights, maybe 300# or so. I just now checked one of the ingots and it measured .082 on my Cabine Tree tester, or between 13-14 BHN. I thought these were newer coww and was expecting a lower reading. These were air cooled and I got repeatable readings several times. These were also hand sorted, so I'm not expecting any zinc contamination. What are you Guys getting on yours? I am pretty sure that I'm reading the chart correctly.