Fully powered cartridge

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A fully powered cartridge, also called full-power cartridge or full-size cartridge, is an umbrella term describing any rifle cartridge that emphasizes ballistics performance and single-shot accuracy, with little or no concern to its weight or recoil. The term generally refers to traditional cartridges used in machine guns, bolt action and semi-automatic service rifles and select fire battle rifles prior to, during and immediately after the World Wars and into the early Cold War era,^[1] and was a retronym originally made to differentiate from intermediate-power rifle cartridges that gained widespread adoption into military service after World War II.

Full-power cartridges often have a caliber comparable to or greater than 7.5 mm (0.30 in) and a maximum effective range of at least 800 m (870 yd),^[2] and are intended for engaging targets beyond 300 m (330 yd). However, cartridges with calibers as narrow as 6.5 mm (0.26 in) have been described as being a full-power rifle cartridge.^{[by whom?][citation needed]} According the cartridge's overall length (COL), full-power cartridges can be grouped into long-action or "standard-action" cartridges, which are traditional cartridges (exemplified by the .30-06 Springfield, 8mm Mauser and 7.62×54mmR) with a COL between 72 and 85 mm (2.8 and 3.3 in); and short-action cartridges (such as the .308 Winchester and 6.5mm Creedmoor), which have a COL between 57 and 72 mm (2.2 and 2.8 in) and largely replaced long-action cartridges as battle rifle service ammunitions since the Cold War. Cartridges with a COL above 85mm are often however considered magnum cartridges instead of "full-powered".

Most modern full-power rifle cartridges have their origin in the late 19th century and early 20th century with the advent of smokeless powder. Examples include the 6.5×55mm Swedish, 7×57mm Mauser, 7.5×55mm Swiss, 7.5×54mm French, 7.62×51mm NATO, 7.62×54mmR, .30-06 Springfield, .303 British, 7.65×53mm Mauser, 7.7×58mm Arisaka, 7.92×57mm Mauser, and 8×50mmR Lebel.^[3][4] The US military's Next Generation Squad Weapon Program selected the 6.8×51mm Common Cartridge in 2022 for testing in a new carbine, new light machine guns and possibly in converted general-purpose machine guns. This does not guarantee actual widespread future issue of the brass-steel hybrid cased 6.8×51mm Common Cartridge.

Despite the ubiquitous adoption of assault rifles and intermediate-power rifle cartridge cartridges as the standard weapon infantry weapon system, full-power rifle cartridges are still widely used today in battle rifles, designated marksman rifles (DMRs), sniper rifles, general purpose machine guns (GPMGs), and conventional hunting rifles.^[5]