This video from DemolitionRanch tests the penetration capabilities of various firearm calibers against stacked automotive brake rotors. The experiment, led by Matt Carriker, demonstrates that smaller calibers like .22 LR and .45 ACP are largely ineffective, while larger rifle rounds like 5.56mm and .338 Lapua Magnum show significant penetration. The .50 BMG proves capable of penetrating multiple rotors, highlighting its extreme power. The test also explores whether high-velocity impacts can ignite brake cleaner applied to the rotors.
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