Sierra 22 Cal 55gr SPT

Sierra 22 Cal 55gr SPT

The Sierra 22 Cal 55gr SPT is a precision-engineered soft-point Spitzer component bullet built for varmint hunters and reloaders seeking exceptional long-range accuracy, aerodynamic efficiency, and controlled terminal expansion in .22-caliber rifles. Featuring a .224‑inch diameter, 55‑grain weight, and flat-base Spitzer design, this bullet is renowned for its stability at extremely high velocities and its ability to maintain pinpoint accuracy at extended ranges.

Designed with a drawn copper-alloy jacket and traditional lead core, the 55gr SPT is capable of producing ¼ MOA groups in well-tuned rifles. The flat-base construction enhances consistent base pressure, while the sharp Spitzer point minimizes drag, resulting in a flatter trajectory and excellent wind resistance. These bullets are a preferred choice for experienced varmint shooters using high-velocity cartridges like the 22-250 Remington and 220 Swift.

Manufactured to Sierra’s exacting specifications—55.0 grains weight, 0.224″ diameter, and sectional density near 0.157—the bullet features uniform jacket thickness, tight concentricity, and clean ogive alignment. This ensures reliable seating, stable chamber pressures, and sub‑MOA consistency in carefully developed handloads.

While effective in .223 Remington and .222 Remington platforms, the bullet’s construction is considered slightly “hard” at those lower velocities and excels when pushed by higher-energy cartridges. It offers reliable expansion and energy transfer on varmints and small predators at ranges where other bullets may fragment prematurely.

In handgun use, the 55gr SPT retains its exceptional accuracy but is generally too hard for reliable varmint expansion at standard handgun velocities. Unless fired from a specialty platform capable of exceeding 3,000 fps muzzle velocity, it is best reserved for target or silhouette shooting in pistol applications.