Just back from local Gun show. Picked up a few 20 rnd boxes of military 30-06. magnetic, cupronickle plated 150gr ball, black ring at cannalure, annealed brass, berdan primed, 47.5gr some kinda square flake powder. Seems to have French labels on the boxes. MLe 1949 on each box. 2 lots …49-54 and 702-52. My guess corrosive. Anybody know what this really is? My plan was to shoot it.