Same sort of experience here as arkypetes. I fell into a huge pile of monotype that had a coppery tint to the cast bullets, and was hard as a banker's heart (this was back in the days before I had a hardness tester, bhn unknown). The rifle bullets cast from it performed beautifully at relatively high velocity(thanks to proper fit no doubt), .45 pistol bullets cast from it leaded like crazy do to woefully improper fit in the chamber throats and forcing cone of that particular gun.
