This video explores the penetration capabilities of various handgun calibers against a Level 3A ballistic vest. The presenter regrets purchasing a 5.7x28mm handgun primarily for testing its effectiveness against armor, noting the high cost of ammunition. The tests reveal that while longer barrels generally increase velocity, the 5.7x28mm round, despite its small diameter, successfully penetrated the vest, outperforming 9mm FMJ, 10mm, and .50 GI rounds in this specific test.
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