This video demonstrates a ballistics test to determine if books within a backpack can slow down or stop 9mm jacketed hollow-point (JHP) rounds. The instructor fires Winchester 9mm JHP ammunition from a CZ P10 into a backpack containing books, then examines the penetration and recovers the bullets. The test shows that while books can impede bullets, they do not always stop them completely, with some rounds penetrating through multiple books.
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