I've been shooting U.S. military rifles since shortly after Moses crossed the Red Sea. Everything I've read in both military and commercial sources leads me to believe that brass used for dummy/blank loads was of second quality not considered suitable for loading for service loads. Even if you had several hundred casings of this stuff, it simply would not be worth the risk of encountering a case failure due to bad brass. Pitch the stuff. For reloading a bolt action rifle, just about any brass will do fine... Lake City is commonly encountered in quantity as is brass from the various domestic commercial producers. For reloading a semi-automatic rifle such as the M-1 Garand, you cannot do better than either Lake City or the Greek HXP currently sold by the Civilian Marksmanship Program. HTH. Sincerely. brucev.