Barrel Harmonics Testing - Part 3

This video investigates the impact of sustained high rates of fire on AR-15 barrel performance, specifically focusing on group size, location, and velocity changes. The experiment compares a lighter Faxon Gunner barrel with a heavier Nordic Components barrel, firing 90 rounds each in 30-shot groups. While some minor degradation in accuracy was observed in later groups, the overall impact was deemed minimal for typical AR-15 shooting scenarios like multi-gun or black rifle matches.

This video demonstrates the significant impact of primer choice on reloading results. By switching from Remington Gold primers to Federal 210 primers, the presenter observed a notable increase in average velocity and a decrease in standard deviation, even with identical other load components. The test highlights how primer selection can affect accuracy and point of impact.

This video tests the accuracy difference between a short 7-inch barrel AR-15 (CMMG Descent) and a long 24-inch barrel AR-15 (Bear Creek Arsenal) at 100 yards. Using the same Triton Orion 1-10x LPVO on both platforms, the test reveals that while the 24-inch barrel is theoretically more precise, both configurations achieved similar group sizes at this distance, with the 24-inch barrel yielding approximately 1-inch groups and the 7-inch barrel producing 1-inch and 1.5-inch groups.

This video emphasizes the critical value of a 'known quantity' accurate rifle setup for effective shooter assessment. By using a consistently performing rifle, shooters can reliably determine if their performance is due to their own skill or equipment issues. The speaker shares a personal anecdote about contaminated ammunition affecting group consistency, highlighting the importance of understanding all variables in a shooting system.

This video details a comprehensive reloading experiment testing 19 different powders with the 75gr Hornady BTHP bullet in .223 Remington. The instructor aims to find a cost-effective path to replicating Mark 262 clone performance, analyzing group sizes and velocities for each powder charge. Several powders, including Hodgdon H322, Vitavouri N135, and AR Comp, showed promising accuracy, with AR Comp emerging as a potential top contender for further development.

This video details a comprehensive test of 6.5 Creedmoor copper solid bullets, focusing on accuracy improvements after thorough bore cleaning. The instructor emphasizes the critical role of a de-coppered bore for consistent performance with pure copper projectiles, contrasting results from clean versus fouled barrels. Load data, bullet seating, and potential issues like hangfires are discussed, offering practical insights for reloaders and shooters.

This guide details a successful method for removing a stuck cartridge case from a firearm barrel using hydraulic pressure generated by a high-pressure grease gun. The technique, demonstrated by Johnny's Reloading Bench, involves a custom adapter and motor oil to hydraulically force the case out. The video highlights the importance of proper tools and high pressure, showcasing a successful extraction that saved a valuable Krieger barrel.

Instruction from a firearms enthusiast and reloader on preparing and sizing 300 Winchester Magnum brass. The video details the challenges of reloading for this caliber, including the long throat of the Thompson Center Compass rifle and the importance of proper neck tension and shoulder bumping. It covers selecting collets, setting up sizing dies, using specialized tools for case maintenance, and determining optimal seating depths for accuracy.

This video provides an in-depth review and performance test of the Vortex Diamondback Tactical 6-24x50 rifle scope, presented by Johnny, an experienced gear reviewer. The review covers technical specifications, a practical tracking test (box test) at 100 yards, and optical quality comparisons with other Vortex models. Johnny highlights the scope's First Focal Plane (FFP) reticle and its value proposition for its price point, while also noting limitations in optical clarity compared to higher-end models.

This video provides a comprehensive guide to reloading .22-250 Remington ammunition, focusing on a Remington Model 788 with a Douglas barrel. It details component selection (brass, bullets, primers, powders), case preparation, powder charging, bullet seating, and initial range testing. The instructor emphasizes accuracy and velocity, aiming to develop loads suitable for varmint and deer hunting, while also highlighting potential challenges with certain components and the firearm's specific characteristics.