Bill, squeeze a pellet with a pair of pliers. If you can compress it, then it's not steel or tungsten-iron. If it does compress, then it's either lead or the old Federal tungsten-polymer. The fact that the pellets are not magnetic means it can't be steel. Federal also had their version of a duplex non-tox load that contained both tungsten-iron and steel pellets in the same shell, so check several pellets. If it's a reload, could be anyhting.