The .30 luger takes something like 5 grains of powder so it's cheap at 1400/pound. Primers will be more and the "killer" will be bullets. 2cents in powder, 3˝cents for a primer and 18cents for a jacketed bullet. Not free but @2/3 of full price. If you start casting then bullets drop to near zero cost.
If you cant see yourself fiddling with this then sell your brass and use that towards more store bought rounds.
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