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400 Rounds Black Hills Ammunition Factory New D556N9 - 5.56 NATO 77 Grain Hollow Point OTM in 50 round boxes in new M2A1 Ammo Can

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D556N9-(400)Ammo Can

Limited quantity of factory fresh 400 round Case Black Hills Ammunition Factory New D556N9: 5.56mm 77 Grain Open Tip Match with Hornady 77 Grain BTHP bullet and Lake City Brass in eight 50 round boxes. Free fully insured shipping in new M2A1 ammo can. OTM = Hollow Point Boat Tail. We have been a Black Hills dealer since 2015.

Black Hills produces factory new rifle ammunition equal to some of the best handloads. It is quickly becoming one of most popular manufacturers of ammunition. Used primarily by all branches of the United State military, this ammunition is also used by competitive shooters and hunters. "The 77 grain MK262 ammunition produced by Black Hills Ammunition has been referred to as the most accurate mass-produced 5.56mm ammunition that has ever been type-classified and issued by the US military. Since its inception, genuine MK262 has been manufactured solely by Black Hills Ammunition. For years, MK262 was only available to the civilian population as cosmetic seconds, but more recently Black Hills has made first-run production lots available on the commercial market." Molon posting on lightfighter.com

Starting in 2023, Black Hills has been using Hornady projectiles in the red box 5.56 77gr OTM. Before then, it was always a Sierra projectile. This 77gr OTM bullet is made by Hornady exclusively for Black Hills. Black Hills has stated that the ballistics coefficient and jacket thickness should be identical, and that Hornady bullet performed identical to the Sierra bullet in their testing. This ammunition is loaded with Lake City brass that has undergone factory annealing which extends brass life. As a result of the annealing process the neck portion of the brass may be discolored until the case are cleaned. 

The MK262 is what the military uses. The 5.56 77gr MK262 MOD 1-C (ammo can) is the commercial version of the MK262 and is also produced with a Sierra projectile. We currently have in stock 460 Rounds of Black Hills 77gr OTM cartridges with the Sierra projectile in Mil-Pack Ammo Cans MP460556N9

We also have in stock Black Hills D556N19. This is the 77gr OTM projectile with a Sierra Tipped Match King bullet. The addition of the polymer tip improves upon the external ballistics by significantly increasing ballistic coefficient from .373 to .420. What this means is that the TMK projectile is much more resistant to both drag and wind, meaning it flies flatter and straighter in adverse conditions. The tip also improves terminal ballistics, increasing uniformity of performance and penetration when the projectile arrives on target.

Please Note: While the 5.56x45mm NATO will fit in a .223 Remington chamber, the 5.56 is a military round that runs at higher pressures than its .223 counterpart and is not recommended to be fired in a .223 Remington chamber.

Technical Information

  • Caliber: 5.56x45mm NATO
  • Bullet Weight: 77 Grain
  • Bullet Style: Sierra MatchKing Hollow Point
  • Case Type: Brass

Ballistics Information:

  • 77 Gr. Open Tip Match (OTM)
    Velocity: 2750 FPS
    Energy: 1293 Ft. Lbs.

    24” Test Barrel

  • 77 Gr. Open Tip Match
    Velocity: 2750 FPS
    Energy: 1293 Ft. Lbs.
    77 Gr. TMK

    20” Test Barrel