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Frontier® Cartridge is a division of Hornady® that uses state-of-the-industry loading techniques and quality control procedures to ensure absolute reliability and consistency in every round. Made in the USA with military-grade brass cartridge cases, primers and propellants.
NOTE: While the 5.56x45mm NATO round will fit in a .223 Remington chamber, 5.56 NATO is a military round that runs at higher pressures, and is not recommended for use in .223 Remington chambers.