This experiment tested the ground penetration depth of five different calibers: 9mm (9.5 inches), 10mm (17.5 inches), .44 Magnum (19 inches), 5.56 Green Tip (6 inches), and a 12 Gauge Slug (6.5 inches). The .44 Magnum achieved the deepest penetration. The 5.56 Green Tip's shallow depth was attributed to potential fragmentation or instability.
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