A few years back, I was given a box of approximately fifty 50BMG cases. I never really looked at them as I have maybe a 1,000 50 BMG cases on hand. Well, yesterday I got around to sizing 50BMG on my Dillon BFR (Big Fifty Reloader). While I was at it, I decided to resize and process these cases as well. That's when I discovered a headstamp that was unfamiliar to me. All these cases were headstamped "LC 4." Now I get the Lake City part as anyone who has ever processed military brass has. However, all the military cases I've processed in the past have had two-digits for the year. Now Lake City didn't start operating until 1940 and I am suspecting these may be WWII era cases. I was just wondering if someone could confirm this and whether it would be safe to reload these. They do appear to be in good shape. Thank you!