The term "Valkyrie" is often associated with the .224 Valkyrie cartridge, which is a relatively new rifle cartridge developed by Federal Premium Ammunition. The .224 Valkyrie was introduced in 2017 and is designed for use in AR-15 style rifles.

The .224 Valkyrie cartridge has a caliber of .224 inches (5.56mm), which is the same diameter as other popular rifle cartridges such as the .223 Remington and the 5.56x45mm NATO. However, the .224 Valkyrie is specifically designed for long-range shooting and offers improved ballistics and long-range performance compared to other cartridges in its class.

The .224 Valkyrie cartridge features a relatively heavy and aerodynamic bullet, which allows it to retain velocity and energy over longer distances. It has a higher ballistic coefficient and a flatter trajectory than many other .22 caliber rifle cartridges, making it well-suited for precision shooting and long-range competitions.

The .224 Valkyrie cartridge has gained popularity among competitive shooters and long-range enthusiasts due to its impressive performance at extended distances. It offers improved accuracy, reduced wind drift, and better energy retention compared to some other .22 caliber cartridges, making it an attractive option for those seeking a versatile and capable round for long-range shooting applications.