This specific cartridge is a small-caliber, high-velocity round designed for use in personal defense weapons and some submachine guns. Characterized by its bottlenecked case and spitzer-type bullet, it offers a flat trajectory and significant penetration against body armor, particularly soft armor. For instance, its performance is often compared to that of the 5.56x45mm NATO round, although it is smaller and lighter.
The development of this type of ammunition stems from a need for a more effective round against protected targets. Its high velocity contributes to its armor-piercing capabilities, while its small size allows for higher capacity magazines in firearms. Historically, it was introduced in the late 20th century and has since gained prominence among military and law enforcement agencies in certain regions. Its adoption reflects a shift towards prioritizing effectiveness against modern protective gear.