Hello, I just acquired a large amount of mixed 12ga. shotshells in a deal and about 400 of them are loose in a big box, all are factory loads but most of the labeling has worn off the shells. now for the stupid question: how the hell do I tell the steel shot from the lead? all shells with plastic tubes, some are smooth plastic and feel waxy and others are hard + corrugated. Alot of them are winchester double x magnum #4. also am having the same problem with bunch of mixed 20ga. so is there a way to tell the steel from the lead, by the casings used etc... or am I screwed?