DTIC's mission is " to preserve, curate, and share knowledge from DoD's annual multi-billion dollar investment in science and technology, multiplying the value and accelerating capability to the warfighter"
As an example, here's a link to a study the US Army did in 1945 testing: "Resistance of M1 Helmets of Varying Thicknesses and of M1 Helmets Fitted with Plastic Liners to Perforation by the Soft and Hard Types of Caliber .45 M1911 Ball Ammunition"
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