M855A1 Accuracy Test

This review of the M855A1 5.56mm round focuses on its enhanced performance, achieving 20-inch barrel velocities from a 14.5-inch barrel due to a 10,000 PSI pressure increase. Ballistic gel testing reveals significant expansion and fragmentation patterns at various depths, highlighting its effectiveness as a defensive and military-grade ammunition.

This video features a comparison of the effectiveness of 5.56mm ammunition against mild steel. The demonstration utilizes an HK SL8 rifle equipped with a Triton LPVO scope. The focus is on the ballistic performance of the 5.56mm round when impacting a steel target.

The M855A1 cartridge significantly increases chamber pressure (59,160 PSI vs. 51,522 PSI for M855) to achieve M4A1 carbine velocities, leading to accelerated barrel wear and reduced service life. It requires specialized magazines like the EPM or PMAG Gen 3 due to its projectile design and feeding characteristics. While offering improved penetration over M855, its overall effectiveness is debated due to these drawbacks.

This video demonstrates an extreme reliability test on an AR-15 by removing its gas rings. Despite this critical component failure, the rifle successfully cycled and fired, showcasing remarkable resilience. The test highlights the importance of proper firearm maintenance and the potential for unexpected performance under adverse conditions.

This video compares bump firing to a Forced Reset Trigger (FRT) for rapid fire accuracy. A bump fire setup with a 5.56 rifle at 20 yards achieved 7/10 hits. The Davidson Defense FRT in a GForce Arms Jawbone 9mm PCC achieved 10/10 hits, demonstrating superior accuracy and control for rapid fire.

This video features the Arsenal SAM5 rifle, chambered in 5.56x45mm, highlighting its AK47-style platform with a milled receiver. The content creator, 704Tactical, promotes various channels and affiliate links for gear, merchandise, and memberships. The description includes disclaimers about affiliate links and product review samples, indicating a focus on product evaluation and channel promotion within the firearms community.

This video demonstrates a successful method for removing a severely stuck case from an AR-10 barrel using a high-pressure grease gun and hydraulic oil. Despite a previous gunsmith's failure, the technique involving a custom adapter and specialized grease gun achieved extraction. Post-removal inspection and range testing confirmed the barrel's integrity and sub-MOA accuracy.

This video provides a comprehensive guide to reloading ammunition for the Thompson Center Compass chambered in 300 Winchester Magnum. It meticulously covers each stage of the reloading process, from an introduction and detailed discussion of components and equipment to the practical steps of brass resizing and preparation, load data analysis, setting overall length (OAL), priming, powder charging, and bullet seating. The video culminates in a range test to evaluate the reloaded ammunition, followed by a brass inspection and group review, and concludes with future plans. The content is highly educational for anyone looking to start reloading this specific caliber and rifle.

The Vortex Diamondback Tactical 6-24x50 offers excellent value for its $400 price point, featuring First Focal Plane (FFP) capability and a usable EBR-2C reticle. While it shows some chromatic aberration and has slightly mushy turrets compared to higher-end models, its tracking accuracy is comparable to the more expensive Strike Eagle. It's a strong contender for budget-conscious long-range shooters, though FFP might be less ideal for hunting than SFP.

This video explores the experimental firing of .22 airgun pellets using .22 caliber nail gun blanks, achieving velocities over 2200 fps with Level 4 loads. Despite some pellet instability at 50 yards, accuracy remained surprisingly tight, demonstrating the potential for this unconventional projectile method. The host emphasizes proper muzzle-loading technique for rifling engagement and uses a chronograph for precise data collection.