Ammo Specifications
More Information on .22 Long Rifle Ammo
Lapua Pistol King .22 LR 40 Grain Lead Round Nose (420164) is a specialized rimfire cartridge developed specifically for precision pistol competition and other accuracy-focused shooting with short-barreled firearms. Rather than emphasizing high velocity, Pistol King is engineered around consistency, controlled performance, and dependable functioning. Lapua describes the cartridge as an extremely accurate competition load optimized for short barrels, making it distinctly different from inexpensive high-velocity .22 LR ammunition intended primarily for casual plinking.
The cartridge is loaded with a 40-grain (2.59-gram) Lead Round Nose (LRN) projectile, a traditional bullet configuration widely used in precision .22 LR ammunition. The round-nose profile provides straightforward, consistent feeding, while the 40-grain weight represents the established standard for many match-oriented rimfire loads. Pistol King is designed around predictable shot-to-shot behavior rather than terminal performance, so its primary applications are target shooting, competition, and precision practice rather than hunting or varmint use.
A particularly important characteristic of Pistol King is its relatively moderate velocity. For product number 420164, Lapua publishes a muzzle velocity of 285 meters per second, which converts to approximately 935 feet per second, when tested from a 150 mm barrel. Muzzle energy is listed at 105 joules, or approximately 77 foot-pounds. At 50 meters, Lapua’s ballistic data shows approximately 266 m/s (873 fps) and 91 joules of retained energy. At 100 meters, those figures decrease to approximately 247 m/s (810 fps) and 79 joules.
Those specifications are important because Pistol King is specifically optimized around handgun-length barrels. Lapua’s 150 mm test barrel is approximately 5.9 inches long, providing ballistic figures that are more representative of competition pistols than data obtained from a conventional rifle-length test barrel. Its moderate velocity also produces a relatively mild recoil impulse, an important characteristic for precision pistol disciplines where maintaining consistent technique from shot to shot is essential.
Accuracy and consistency are the central themes of the Pistol King design. Lapua developed the ammunition to provide smooth, reliable, and dependable functioning while maintaining the level of precision expected from dedicated competition ammunition. Consistent ammunition can reduce one source of variation during competition, allowing the shooter to concentrate on fundamentals such as sight alignment, trigger control, grip, and follow-through.
Like other .22 LR ammunition, Pistol King uses a rimfire-primed brass case and is intended for firearms specifically chambered for .22 Long Rifle. Because individual precision rimfire firearms can demonstrate noticeable preferences for particular ammunition, actual accuracy will depend on the specific pistol or rifle in which it is fired.
Packaged in a 50-round box, Lapua Pistol King 420164 is firmly positioned as precision-oriented .22 LR ammunition rather than a general-purpose bulk load. Its combination of a 40-grain lead round nose bullet, approximately 935-fps published muzzle velocity, short-barrel optimization, and competition-focused manufacturing makes it a purpose-built choice for shooters seeking consistent performance from precision rimfire pistols.
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