Videos tagged with 55 Grain Ammunition

This video argues that longer barrels, specifically 18-20 inches, are superior for 5.56x45mm NATO ammunition in WROL (When the Rule of Law is Gone) scenarios. The speaker, identifying as an average 20-inch rifle enjoyer and drill sergeant, emphasizes that velocity is critical for 5.56's lethality, and shorter barrels like those on AR pistols (e.g., 10.5-inch Mark 18s) fail to achieve sufficient velocity with common 55-grain ammunition. This results in poor terminal ballistics unless precise vital hits are made. A longer barrel maximizes velocity, leading to better performance and more forgiving shot placement.

This video demonstrates the effectiveness of a clip-on thermal optic, specifically the PFN640+ or RH25, mounted via a flip-to-side adapter. The setup allows for seamless transition between thermal imaging, red dot sight, and magnifier, enhancing target acquisition at various distances. The presenter highlights its utility for identifying targets in daylight and its potential for nighttime operations, showcasing its accuracy at 100 and 300 meters with 223 Remington 55-grain ammunition.

This video explains the critical relationship between a rifle's twist rate and ammunition bullet weight for optimal stabilization and accuracy. Matching heavier bullets with faster twist rates (lower numbers like 1:7) and lighter bullets with slower twist rates (higher numbers like 1:12) is crucial for predictable trajectories. The presenters emphasize that using the wrong ammunition can lead to poor accuracy, keyholing, or even bullet instability, especially at longer distances.

This video details a crucial training drill for competitive rifle shooters preparing for events like the IPSC Rifle World Shoot. The instructor demonstrates how to determine the mechanical offset of lighter ammunition (55-grain) relative to a rifle zeroed for heavier, long-range rounds (75-grain). By shooting groups at various distances, shooters can establish precise holdovers and holdunders, ensuring accuracy on tight no-shoot targets and optimizing ammunition choice for different stages of competition.

This video showcases a DMR (Designated Marksman Rifle) challenge between Locs and Eric, focusing on PRS (Precision Rifle Series) positional shooting techniques. The drill involves engaging two silhouette plates at approximately 150 yards from a standing position after a buzzer start, emphasizing accuracy and speed under timed conditions. Participants discuss ammunition choices, specifically 55-grain and 77-grain loads.

This video details a rigorous test of the Safe Life Level III FRAS plate, focusing on its flexibility and protective capabilities against various rifle threats at close range. The testing involved multiple ammunition types, including M67 ball, SS109, and 55-grain rounds, fired from different rifle platforms. The results highlight the plate's ability to stop projectiles while also demonstrating significant backface deformation, a trade-off for its lightweight and flexible design.

This review covers the Brownells XBRN177E2 retro rifle, a faithful reproduction of the original 1967-era carbine. The reviewer highlights its light weight (under 6 lbs), true-to-type features like the XM177 moderator (pinned and welded to meet 16-inch barrel requirements), and M16A1 receivers. It was used successfully in the Desert Brutality competition's retro division. Accuracy testing revealed a preference for lighter bullets (40-55 grain) with the 1:12 twist rate, struggling with heavier 69-77 grain rounds.