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Hornady Superformance .5.56 NATO 55gr Ammunition w/CX Bullets (20/Box) 812544

SKU 812544-Hornady

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Export Restrictions
Government Export Restriction
This item may be regulated for export by the U.S. Department of State or the US Department of Commerce. Please see our Export Policy.
Ammo Restrictions
Ammo Requirements
Ammunition may not be shipped to AK, CT, HI, MA, Washington D.C., or the cities of Chicago, IL, New York, NY, Buffalo, NY or Rochester, NY. In CA and NY, ammunition can only be shipped to a licensed federal firearms dealer, licensed ammunition vendor, or registered seller of ammunition. Please see our Shipping Policy for more details on purchasing ammunition.


Hornady sets a new standard for hunting ammunition with the Superformance series. Available with either V-MAX, NTX, SST, CX, or InterLock bullets, the Superformance cartridges boost muzzle velocity by 100 fps to 200 fps, without increasing felt recoil or muzzle rise, and are compatible with virtually any firearm. This advancement in terminal performance is made possible thanks to a scientifically derived propellent that’s been optimized for efficiency. The development of the propellent involved temperature tests between -20° and 140° Fahrenheit, which resulted in extremely stable performance regardless of temperature. Other tests involved firing Superformance cartridges out of progressively shorter barrels, proving that the rounds were highly effective is any length of barrel – including short barreled rifles (SBRs). In addition, Superformance ammunition is safely within SAAMI pressure guidelines. Gas operated firearms are also perfectly safe to use with Superformance ammunition.

Features of the Superformance Ammunition:

  • Increases muzzle velocity by 100 fps to 200 fps, without increasing felt recoil or muzzle rise
  • Compatible with virtually any type of firearm
  • Effective in all barrel lengths, including short barreled rifles (SBRs)
  • Safely within SAAMI pressure guidelines


  • Bullet Type:CX
  • Caliber:5.56 NATO
  • Bullet Weight:55gr
  • Velocity:Muzzle: 3175 fps
  • Item ConditionNew
  • Product TypeAmmunition
  • UPC090255719932
  • MPN812544

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