Videos tagged with Sierra MatchKing 77gr

This guide details how to create and utilize a DOPE (Data on Previous Engagements) card for your rifle, transforming it into a precision instrument usable by anyone. It covers zeroing, ammunition selection, ballistic calculations using apps and chronographs, accounting for suppressor effects, engaging moving targets, and documenting rifle-specific quirks. The instruction emphasizes practical application for first-round impacts at extended ranges, demonstrating how to transfer complex ballistics data into an easily usable format.

This review examines an Anderson Manufacturing 16-inch AR-15 barrel, detailing its technical specifications including nitride treatment, government contour, and 1:7 twist rate. The reviewer conducted accuracy tests with 55-grain Hornady, 69-grain Sierra MatchKing, and 77-grain Sierra MatchKing ammunition, noting disappointing performance across all loads, with the 69-grain SMK showing the best but still poor results. The barrel was purchased on sale for $50, and expectations were low but not this low.

This video details the process of duplicating the Mk 262 Mod 1 ammunition, using factory Black Hills 77gr OTM as a benchmark. Expert Johnny provides a methodical approach, starting with baseline testing of factory rounds for accuracy and velocity. He emphasizes safety, component analysis, and the use of ballistics software like QuickLOAD to select appropriate reloading components and powders for achieving military-grade performance. The guide covers historical context, cost analysis, and detailed component inspection.