My brother in-law snagged me 97 pounds of lead fishing weights some recreational diver had collected over the years. Many had been under water so long that the brass eyes had corroded away. I netted 92-93 pounds after melting n fluxing. There was a lot of trash n crud and the three fluxes probably wasn't quite enough. I imagine they would be about equal to outdoor range lead in regards to dirt, trash and oxidation. Initial pencil hardness makes them about equal to SOWW at 10bhn. They will serve me just fine for 50/50 with COWW and will get fluxed a bit more.