Test: M855 vs M855A1 is the M855A1 really that good?

This guide outlines the experimental process used by Garand Thumb to test the close-range lethality of 5.56x45mm NATO ammunition from various barrel lengths (10.3", 11.5", 16"). Utilizing ballistics gel and high-speed cameras, the test provides data on projectile performance, debunking myths about short-barreled rifle effectiveness. The expert-level analysis confirms 5.56mm's devastating performance even from SBRs at moderate distances.

This video provides an expert-level demonstration of the terminal ballistics differences between 5.56mm M193 and M855 Green Tip ammunition. The demonstration, conducted by Guns Blazing Ranch, clearly shows M855's superior penetration capability on concrete due to its steel penetrator core, contrasting with M193's more superficial impact. The Springfield Armory Saint rifle, equipped with a suppressor, is used for the live-fire tests.

This video provides a clear, demonstrative comparison of 9mm FMJ versus R.I.P. ammunition performance. Utilizing a Sig Sauer M17 and slow-motion videography, the test shows the distinct impact characteristics of each round on a clay block. The R.I.P. round exhibits a significantly more destructive and fragmenting effect compared to the standard FMJ.

This video provides an expert-level analysis of various 5.56x45mm ammunition types, comparing their terminal ballistics through extensive ballistic gel testing. The Dirty Civilian channel, known for its technical accuracy, demonstrates the performance differences between rounds like the M855, M855A1, M193, Sierra Matchking 77gr OTM, and a futuristic Black Arc Munitions 80.5gr OTM. The insights highlight how bullet construction, weight, and design significantly impact effectiveness in soft tissue, offering practical knowledge for firearms enthusiasts.

This video provides an expert-level analysis of the .45 ACP cartridge's effectiveness, comparing it to 9mm. It delves into the historical context of its design by John Browning, its ballistics, and its performance in modern contexts. The analysis debunks myths like 'knockdown power' and emphasizes that shot placement, penetration, and expansion are key factors, with modern ammunition narrowing the performance gap between calibers. The video concludes that .45 ACP remains a viable and effective cartridge, especially for suppressed use, but stresses that shooter skill and training are paramount.

This video features guest 'Isle of Him' discussing three types of 5.56 ammunition: M855 (green tip), M855A1 (silver/steel tip), and M856 (orange tip tracer). The expert highlights the superior armor penetration of M855A1 over standard M855, noting that M855 is stopped by Level 3+ armor while M855A1 defeats it. M856 tracers are explained as a tool for observing shot trajectory. The consensus is that M855A1 is the most effective round among those presented for defeating body armor.

This guide covers the setup and operation of the Daniel Defense DDM4 PDW in .300 Blackout, as presented by a firearms instructor. It details the installation of common accessories like suppressors, lights, and optics, along with magazine loading and stock adjustment. The video emphasizes the PDW concept's utility and the effectiveness of the .300 Blackout cartridge, concluding with a live-fire demonstration.

This video features Tim from Military Arms Channel demonstrating the Remington 742 semi-automatic rifle chambered in .30-06 Springfield. He compares the .30-06 cartridge to the 5.56x45mm used in AR-15s, highlighting the power difference. The demonstration includes live fire at a steel target, showcasing the rifle's operation and magazine insertion.

This guide details the installation of the AR-57 upper receiver onto a standard AR-15 lower receiver, enabling the use of the 5.7x28mm cartridge. It also covers a practical modification using a Magpul PMAG as a brass catcher, demonstrating how spent casings are ejected downward through the AR-15's magazine well. The information is presented with high authority by Military Arms Channel, a recognized firearms reviewer.

This guide details how to swap the stock on a Ruger Mini-14, demonstrating its modularity by replacing a synthetic stock with a classic wood folding stock. The video features a live-fire demonstration of the rifle in its 'A-Team' style configuration, highlighting its rapid-fire capability. The host, a recognized firearms expert, provides an informative and confident assessment.