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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 the reliability and consistency of every round. Made in the USA with military-grade brass cartridge cases, primers and propellants.
PLEASE 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 pressure than its .223 counterpart, and is therefore not recommended for use in rifles chambered for .223 Remington.