Box of 300 H&H MAGNUM super match


#1

can you date a box of 300 H&H MAGNUM SUPER MATCH 180 gr. F.M.C.B.T. LOT 6010 FSN 1305-348-8648-000 What years did the U.S. use 300 H&H. Must have been before the 300 Winchester Mag was used for matches?