50 BMG contra barreira de água: será que você sobrevive?

This video tests the penetration capabilities of various calibers against a boulder, culminating with the .50 BMG. While smaller calibers like .22 LR, 9mm, and .45 ACP caused minimal damage, larger rounds like 5.56mm and 12 gauge slugs began to chip the rock. The .308 and initial .50 BMG shots caused significant fragmentation but did not penetrate. A second .50 BMG shot successfully penetrated the boulder.

This video argues that 9mm Pistol Caliber Carbines (PCCs) are a more practical and cost-effective training platform than 5.56 AR-15s for most civilians in the United States. The instructor emphasizes the superior availability and affordability of 9mm ammunition, which allows for more frequent and realistic training. While acknowledging the superior ballistics of 5.56, the video highlights that 9mm PCCs offer sufficient performance for common engagement distances and scenarios, especially in urban or vehicle environments. The instructor, identifying as an MMTC Marksmanship Master Trainer, stresses that skill is repetition-based and training with the platform you'll actually use is crucial.

This video from Brownells, featuring Caleb, explores the optimal zero distances for an AR-15, primarily for competition use. It analyzes four common zero distances: 25, 36, 50, and 100 yards, detailing their impact zones on an IPSC A-zone target at various ranges. The instructor emphasizes that the 'best' zero is dependent on the intended use of the firearm and the optic employed, recommending the 100-yard zero as a versatile option for experienced shooters, while suggesting 36 or 50 yards for those using red dots or LPVOs respectively, especially for closer engagements.

This video from GBRS Group explains the ballistic principles of deviation and deflection. Deviation is defined as a projectile passing through an object, while deflection is a contact that disrupts or changes trajectory. The demonstration uses 5.56x45mm rounds impacting pillars to illustrate these concepts, showing how fragments can cause minor disruption without lethal effect.

This content, featuring Retired Sgt. Maj. Kyle Lamb of Viking Tactics, Inc., focuses on the practical application of the AR-15 platform within the NRA ARC Challenge. It emphasizes fundamental shooting skills such as zeroing, understanding mechanical offset, and utilizing holdovers, crucial for both new and experienced shooters. The discussion highlights how the AR platform's modularity and the ARC Challenge's structure encourage skill development and informed gear choices for all levels of firearm owners.

This video explores the terminal ballistics of 9mm ammunition impacting a frozen lake. The experiment demonstrates that while 9mm rounds can penetrate ice, they do not typically bounce back spinning as some might expect. The test also shows that even with shallow ice, 9mm bullets can be recovered, and a 'mag dump' can effectively create an ice fishing hole.

This video explores the compatibility of a 50 BMG cartridge with a 12 gauge flare gun. The experiment reveals that while the cartridge fits, the flare gun's mechanism cannot ignite the tough 50 BMG primers. However, it successfully fires a standard 12 gauge blank, highlighting the difference in primer hardness. The content is presented from a hobbyist perspective, focusing on experimental curiosity rather than professional instruction.

This video from Tática Civil, featuring an expert instructor, explains the dangers of firing upwards due to projectile drop and terminal velocity. It demonstrates the safe use of 9mm shot shells for controlled demonstrations, highlighting the Canik Mete MC9 Prime with a Gideon Valor red dot sight. The instructor emphasizes crucial firearm safety protocols.

This guide details an experimental test to debunk the myth that a .50 BMG round passing near a target can be lethal. Using a ballistic mannequin, cardboard indicators, and a concrete backstop, the test demonstrates that a near miss from a .50 BMG round does not impart enough shockwave or air pressure to cause fatal injury, though the projectile itself possesses immense kinetic energy as evidenced by its impact on the concrete block. The test was conducted objectively by an individual with high authority, indicated by their empirical testing methods and proper safety protocols.

This video explores the surprising functionality of a realistic toy shotgun, the M870 by Dart Armory. The presenter tests if it can chamber and cycle real 12-gauge shotgun shells, comparing its operation to a Mossberg 590. The toy shotgun successfully loads, chambers, and ejects real shells, demonstrating a high degree of realism in its mechanical operation.