Videos tagged with 77 grain

This video provides a detailed, data-driven analysis of AAC 77gr OTM ammunition consistency across different production lots. Lead Firearms Instructor Preston Moore employs advanced testing equipment and methodology, including 30-shot groups and multiple chronographs, to assess velocity, accuracy, and lot variance. The findings highlight AAC's value proposition as a budget-friendly option, while comparing its performance against premium ammunition brands.

This video provides a detailed range test of the PSA Sabre MK12 retro clone build, focusing on accuracy with premium ammunition. The presenter, Roger Barrera, uses Norma 77-grain Match Grade ammunition and a Primary Arms GLX 2.5-10x optic to evaluate the rifle's performance. He demonstrates the process of adjusting the optic based on group sizes and discusses the rifle's potential accuracy and value.

This stage of the High Desert Brutality match, 'Silent Scope,' emphasizes rifle-centric engagement of targets at varying distances up to 390 yards. Competitors utilize a randomized target engagement system, drawing cards to determine which of the five blended targets to engage from prone and then a less supportive position. The speaker highlights the effectiveness of a 20-inch AR-15 platform with Mk 262 77-grain ammunition and a 4x ACOG optic for this type of precision shooting.

This guide, informed by DJ Shipley of GBRS Group, debunks cinematic myths about shooting, emphasizing the immediate incapacitating effects of high-velocity rounds like 5.56 NATO due to fragmentation and tumbling. It stresses that precise shot placement is the most critical factor for terminal effect, overriding caliber debates. The advice prioritizes practical reliability of the firearm and ammunition over theoretical ballistic arguments, reflecting an experience-driven, pragmatic approach to understanding round performance.

This video debunks the myth that 5.56 NATO bullets tumble end-over-end in flight, explaining that tumbling is primarily an effect that occurs upon impact, especially with older rifling twist rates and lighter bullets. The discussion highlights how rifling twist rates, such as 1:12, 1:7, and 1:8, affect bullet stability in flight and upon impact, particularly with different bullet weights like 55, 62, and 77 grains. It clarifies that while a slow twist rate (1:12) with lighter bullets might lead to yawing or keyholing upon impact, the bullet itself does not tumble in the air.

This Guns & Gear video features Ryan Gresham testing Black Hills Ammunition's MK262 Mod1-C precision rounds. The video highlights the ammunition's military specifications, including its 77-grain Sierra open-tipped match bullets and rigorous accuracy testing. The content promotes the show's broadcast schedule on Sportsman Channel and WildTV, as well as where to find full episodes and bonus features on Gun Talk's platforms. The video aims to showcase a specific firearm product and its performance, aligning with typical firearm review content.

This video demonstrates essential post-shot analysis of spent casings to assess rifle function and potential issues. Key indicators include ejection pattern, primer impact clarity, and shell deflector marks, which can reveal problems like over-gassing or firing pin drag. The instructor also tests heavier bullet weights in a rifle with a fast twist rate.

This video provides a comparative analysis of various match-grade ammunition loads, focusing on accuracy and velocity. The instructor shoots three-round groups with different grain weights (77gr, 75gr, 73gr) from brands like Magtech, Fiocchi, Federal, and Hornady, while also recording muzzle velocity. The goal is to identify which ammunition prints the tightest groups and offers the best overall performance for precision shooting.