So my father in law gave me a few thousand 223 bullets. He said he got them from a friend of his who used to reload and hasnt for a long time. looking at them, some of them are heavily corroded others not so much. Some are black some are black and green with corrosion. If I tumble them and pull out he ones that are not damaged from corrosion will this corrosion have any negative effect? Or after tumbling will the be good as new? Or would I be better off melting them down and using them to cast other bullets?