I've been doing some organizing in my gun room, and in the process was sorting some .30-40 brass. I was amazed at the head stamps I found, and these were just the ones that don't say .30-40 Krag!
W.R.A. Co. 30 ARMY
SUPER SPEED 30 ARMY
REM-UMC 30 USA
SUPER-X 30 U.S.A.
PETERS 30 U.S.G.
U.M.C. 30 U.S.A.
WESTERN .30 U.S.A.
Most of these came from e-Bay, back before the Communists took over there. I'd buy any odd lots of .30-40 brass that were cheap.