Yesterday a young man gave me a .30-06 round of ammunition and two .50 caliber bullets he said were among his grandfather's "stuff" that he picked up and kept from WW II. The .30-06 round is head-stamped S L and across from the S L the number 4. My presumption is that round was manufactured by the St. Louis Munitions Plant in 1944. The tip of the bullet in the '06 round (about 1/4 inch in length) is a brighter color copper or brass than the rest of the bullet and the cartridge case and remains relatively bright despite its age. Can't help but wonder if the copper jacket covers a hardened steel penetrator round rather than lead. The two .50 caliber bullets must not have not been fired because there are no rifling marks on the bullets. The copper jackets of the .50 caliber bullets are very dark brown, almost black. The base of the bullets have a round hole in the jacket with rust showing. Again, my presumption is that this is a hardened steel bullet with a copper jacket. Anyone have a clue on these items? Wish I could post pics … but I am 'puter challenged. Big Boomer