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Hornady Black 5.56 NATO 75-grain InterLock HD SBR ammunition is formulated for reliable function in modern sporting rifles and short-barreled platforms. The load uses Hornady’s InterLock bullet and a clean-burning propellant to reduce muzzle flash and provide consistent internal ballistics. Packaged in twenty-round boxes, this cartridge is intended for a broad range of shooting applications in both suppressed and unsuppressed configurations.

Key Specifications - The cartridge is 5.56 NATO.

• The bullet weight is 75 grains.
• The bullet type is InterLock HD SBR (Jacketed Soft Point).
• The package contains 20 rounds per box.
• The muzzle velocity is 2321 fps.
• The muzzle energy is 897 ft lbs.
• The ballistic coefficient is .230.
• The case material is brass.
• The product is not reloadable.
• The boxes per case is 10.

Built with Hornady components and InterLock bullet construction, this load offers consistent performance in a compact 20-round format. Its reduced-flash propellant and tuned ballistics make it a practical choice for range work, tactical-style training, and other applications where reliable function and predictable trajectories are priorities.