Lyman also made those. I had one in 45 caliber a while back from a gunshop liquidating they're inventory. The pieces were epoxied together but I don't think that's what you seen from what you describe. I cast 32 caliber round balls of pure lead and melt them separately in a dipper. Pour that melted ball in my rifle bullet mould and finish off with wheel weight. It does good for handgun bullets too, especially hollow points. It prevents a speciality mould for making soft nose bullets.