I am not sure SodaPop, I do know that the ads that I have seen on-line from some of the surplus dealers all have military brass and it is either un-primed or it says primer de-activated I do not know if they use water, oil or how it is done. I would be leery if they used oil for if any remained it may be enough to contaminate the NEW primer when the case is again primed. The only Mil-Surplus cases that I usually purchase is 30-06 and those I usually buy from CMP as once fired brass. I dont know if its the same lot or not, but it is all the same year and maker. After tumbling, de-priming, reaming the primer crimp, resizing, trimming and outside neck turning 99% of the cases weigh within 3 or 4 grains of each other. Thats good enough for me.