Sorry if this has been discussed before but I recently picked up two "tubes" of these buggers and neither I nor my best friend could figure out what these pellets are made out of. It obviously isn't gold or lead, maybe some kind of alloy, like a tin/zinc mixture? It didn't say anything about this on the tube, and despite our best efforts, neither of us could come up with anything solid (than again, neither of us is a Chemistry major either ~LOL~). Any of you guys know anything about this? Thanks in advance and again I aplogize if this ground has been covered before.