Since I’m back home for a few days, I decided to go through my .30 Cal M2 boxes and see what I had. Found two boxes that adds more grist for the mill. They are marked as follows: 20 CARTRIDGES, BALL, CALIBER .30 M2 ALTERNATIVE, AMMUNITION LOT S. L. 8320 (and 8351). Both are GMCS bullets with HS of S L 43.
Now, boxes marked just BALL, CALIBER .30 M2 I found the following: (Red stripe box) LOT U 16469 (U 4 2), GMJ; (Red stripe box) LOT U (U 4 4), GMCS; (Plain box) LOT E. W. 28310 (EW 43), GMCS; (Plain box) LOT F.A. 4333 (F A 5 5), GMCS; (Plain box) AN-M2, LOT RA 43297 (R A 5 7), GMCS; (Plain box) AN-M2, LOT W.C.C. 6871 (W C C 5 6), GMCS.
Is there an explanation somewhere as to what boxes got the red strip? I have the red stripe on my boxes of M1 BALL, F.A. LOT(s) 1882, 1948, and 2011(F A 36/37), but not on LOT 1556 (F A 27). The M2 BALL seems to vary also. It’s puzzling.