Videos tagged with Headspace

This guide, based on expert analysis by Ian McCollum of Forgotten Weapons, details how to identify dangerous amateur headspace adjustments on an AK-type rifle. It focuses on inspecting the bolt's locking lugs and barrel for signs of grinding and improper machining. The video strongly emphasizes the extreme danger of such modifications and advises consulting a professional gunsmith if identified.

This guide details the assembly of a custom 300 PRC barreled action, focusing on precision machining and component integration. It covers chambering, headspacing, barrel length selection, muzzle threading, and final assembly with a Defiance Anti-X action and TriggerTech Primary trigger. The process emphasizes meticulous measurement and adherence to tolerances for optimal performance.

This video demonstrates the dangerous consequences of firing incorrect ammunition in a .308 Winchester rifle. The host, exhibiting high-level expertise, tests .243 Winchester, .260 Remington, and 7mm-08 Remington rounds, highlighting issues like fire-forming brass, extreme inaccuracy, tumbling projectiles, and significantly reduced velocity due to gas blow-by. While technically possible in a dire emergency, the experiment concludes that using the wrong caliber is ineffective and hazardous.

This expert-level guide details the inspection and performance testing of an LMT 12" Piston Barrel, drawing on Preston Moore's analytical approach. It covers critical physical inspections, including feed ramp updates and bore condition via borescope, alongside detailed group testing with various ammunition types. Moore's data-driven methodology provides insights into practical accuracy and potential durability concerns like chrome flaking.

This guide details a rigorous inspection and testing procedure for AR-15 barrels, as demonstrated by Preston Moore. It covers essential physical gauging, advanced borescope analysis to detect internal defects like pitting, and a structured approach to range testing with various ammunition types. The process emphasizes data collection for accuracy and velocity, highlighting the importance of thorough evaluation before and after live fire. Moore's objective and analytical approach provides high-level insights into barrel quality.

This episode features Eric Stecker and Taylor Niles from Defiance Machine and McMillan Stocks discussing the intricacies of precision rifle actions. They delve into the engineering, manufacturing processes, and design philosophies behind Defiance actions, highlighting features that contribute to accuracy and reliability. The conversation covers specific models like the Deviant and Ruckus, the pros and cons of different bolt throws, and the material science behind steel versus titanium actions, offering insights for builders and shooters seeking high-performance components.

This video tests a high-round-count HK416 upper receiver, estimated at 20,000-25,000 rounds, after 10 years of SWAT service. The inspection reveals expected wear but impressive durability. Accuracy testing with three different ammunition types demonstrates the upper's continued capability, though with varying results influenced by ammunition and potential under-buffering.

This video reveals surprising truths about the AR-15 platform, debunking the myth of over-cleaning and highlighting its modularity. It explains how standard AR-15 lowers can accept larger caliber uppers like .450 Bushmaster, .458 SOCOM, and .50 Beowulf, offering increased versatility. A critical warning is issued regarding the dangers of mixing 5.56mm and .300 Blackout ammunition due to potential catastrophic failures. Finally, it emphasizes that building an AR-15 requires more than just parts, stressing the importance of proper assembly, tools, and headspace verification, advising caution for DIY builders.

This video explores the experimental concept of firing a .50 BMG round from a 12 Gauge shotgun. While a break-barrel GForce Pheasant Gun could chamber the round, a semi-automatic GForce II could not. Remote firing was employed for safety, but the experiment ultimately failed due to insufficient firing pin energy and excessive headspace, resulting in light primer strikes and the round pushing further into the chamber.

This video provides a physical inspection of an IWI Zion-15 AR-15 rifle donated for the School of the American Rifle's 10-year anniversary. The inspection revealed the rifle is well-gassed for commercial and NATO ammunition, with a mid-length system and a 0.078-inch gas port. Minor modifications were made, including replacing the extractor spring with a Sprinco 4-coil and adding Rocksett thread locker to the barrel nut screws, which were torqued but lacked initial thread locker.

This guide, drawing from SAAMI experts, clarifies the critical safety differences between 5.56 NATO and .223 Remington ammunition. It emphasizes matching ammunition headstamps to firearm barrel markings to prevent dangerous pressure increases when firing 5.56 NATO in a .223 Remington chamber. The information is vital for safe operation of Modern Sporting Rifles and understanding ammunition interchangeability.

This video details the meticulous process of hand-chambering a rifle barrel, specifically a 300 Blackout for a Thompson/Center Encore. It emphasizes the critical importance of concentricity, headspace set to the minimum specification for optimal accuracy, and the precise use of a lathe and reamer. The demonstration highlights the tedious 'cut and check' method required for achieving tight tolerances, culminating in a test fire that validates the hand-chambered barrel's performance.