I was pointed to this forum for help in indentifying an unknown date and type of Russian 7.62x54R in a sealed metal container. US military ammunition identification guides call the metal galvanized iron with soldered seams although I agree that the properties exhibited appear to be steel that iron.
I could try describe the markings but I think an image would just do better. My only point of concern is that the box appeared to be marked as 7.62 L?? which I took from military guides to mean light ball. The individual who pointed me here indicated an ID of heavy ball. If anything, this particular part of identification is important.
Thank you for your time.