I'm pretty new to casting and smelting and am having a hard time deciding if these are lead or not. These melt much quicker than ones marked "ZN" but they have a higher pitch when dropped onto concrete than lead weights. They also break apart instead of bending. They seem to be painted with something also.
I have just been scratching them on concrete to check for hardness and they seem slightly harder than lead but nowhere near as hard as zinc.
Does anyone know for sure?