In a war of automatic weapons such as this one, ordnance planners long ago foresaw that the armed forces might shoot their way right through the available supply of copper, the key metal in brass cartridge cases. They were right. By this week some 70 companies were making cartridge cases of steel in all sizes, .45-cal. to 105-mm.
Brass was ideal for cartridge and shell cases: it was easily worked, springy and slick and handled well in the gun. In World War I there was no necessity to mother a substitute. But World War...
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