Cloning Mk262 - pt 7 - 8208 XBR and AR-Comp

This video details the process of cloning Mk262 Mod 1 ammunition using BL-C(2) and Ramshot TAC powders with 77gr Sierra MatchKing bullets. While both powders achieved the target velocity of ~2750 fps at an OAL of 2.246 inches, neither provided optimal accuracy at higher pressure levels, with BL-C(2) showing significant degradation and TAC performing slightly better. CCI No. 41 primers yielded higher velocities than Remington 7 1/2 primers when used with TAC.

This video is the fifth part of a series aiming to clone Black Hills 77gr OTM factory ammunition, known as Mk 262 Mod 1. The focus of this installment is testing Hodgdon Varget powder as a component in this reloading endeavor. The description notes that all external links have been removed to comply with YouTube's content policies.

This YouTube video, part 2 of a "Mk 262 Cloning" series, focuses on replicating the Mk 262 Mod 1, specifically the Black Hills 5.56 77gr OTM ammunition. The experiment tests Accurate 2520 as the powder of choice for this reloading endeavor. The description notes the removal of links to comply with YouTube policies and promotes a Patreon page for the creator.

This bonus tip from Gun Talk features Jeff Hoffman of Black Hills Ammunition discussing the critical relationship between barrel twist rates and bullet compatibility for 5.56 NATO and .223 Remington. Hoffman delves into the historical context of twist rates and explains how modern advancements in firearms and ammunition have evolved. The video aims to equip viewers with the knowledge to select the correct ammunition for their rifle's twist rate, ultimately helping them achieve maximum accuracy. It's presented as a valuable insight for any rifle owner looking to optimize their shooting performance.

This video focuses on handloading ammunition for the .223 Remington cartridge, specifically utilizing 77gr Sierra Match King bullets. It's presented as the 13th installment in a "Mk 262 Mod 1 clone" series, indicating a focus on replicating a known military specification. The primary powder tested is VihtaVuori N540, with comparisons also being made to Accurate 2520, IMR 8208 XBR, and AR-Comp powders. The bullet features a Cannelure, which is relevant for certain reloading techniques. The description notes that all external links have been removed to comply with YouTube's policies.

This video fine-tunes Mk 262 clone loads using Accurate 2520 and CFE 223 powders to match Black Hills 77gr OTM factory ammunition. Accurate 2520 at 25.2 grains with a Sierra 77gr SMK bullet achieved 2768 fps and a 0.416" group, while a Nosler 77gr CC at 25.0 grains yielded 2730 fps and a 0.371" group. CFE 223 showed lot-to-lot variation and degraded accuracy at higher pressures.

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.