Black Hills 77gr OTM

Black Hills 77-grain Open Tip Match represents the pinnacle of AR-15 ammunition performance, earning its reputation as the gold standard through rigorous military testing and adoption. This ammunition was specifically developed for the U.S. Navy's Mark 12 Mod 0 and Mod 1 special purpose rifles, where accuracy requirements demanded nothing less than sub-MOA performance. The load uses Sierra's legendary 77-grain MatchKing bullet, which combines a boat tail design with an open tip for exceptional ballistic coefficient and consistent expansion characteristics.

Black Hills' commitment to quality begins with their powder selection, choosing formulations specifically for extreme temperature stability and minimal velocity variation. Each lot is flash suppressed for low-light operations and loaded to exacting tolerances that ensure shot-to-shot consistency. Testing from a 20-inch Colt barrel has shown standard deviations as low as 16 fps with coefficients of variation under 0.6 percent, demonstrating the level of precision Black Hills achieves in their manufacturing process.

What sets Black Hills 77gr OTM apart is its ability to deliver MOA accuracy in a wide range of rifles. With a muzzle velocity of 2,750 fps from a 20-inch barrel and muzzle energy of 1,293 ft-lbs, this ammunition provides the velocity needed for fragmentation while maintaining the stability required for precision shooting. The load is optimized for barrels with 1:8" or faster twist rates and performs exceptionally well from both mid-length and rifle-length gas systems. Whether loaded to .223 Remington or 5.56 NATO specifications (Mk262 Mod 1), Black Hills 77gr OTM is the benchmark by which all other AR-15 match ammunition is judged.