This video details the ongoing quest to replicate the performance of Black Hills' 77gr OTM Mark 262 Mod 1 ammunition. The instructor meticulously tests VihtaVuori N540 powder with 77gr Sierra Match King bullets in .223 Remington, focusing on achieving specific muzzle velocities (2750-2760 fps) and sub-MOA accuracy without pressure signs. The content includes detailed load development, chronograph readings, and group analysis, offering valuable insights for advanced reloaders and precision shooters.
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