Sierra 284 Cal 7mm 140gr SPT

Sierra 284 Cal 7mm 140gr SPT

The Sierra 284 Cal 7mm 140gr SPT is a precision-engineered soft-point Spitzer component bullet built for hunters and handloaders seeking flat trajectories, controlled expansion, and match-grade accuracy in .284‑inch 7mm cartridges. Featuring a sharp Spitzer ogive and soft-point jacket, this 140‑grain bullet offers aerodynamic efficiency, reliable terminal performance, and long-range consistency in rifles such as 7mm-08 Remington, 7mm Remington Magnum, 7mm PRC, and other .284‑caliber platforms.

Designed with a finely tapered Spitzer profile and carefully exposed lead tip, the 140gr SPT promotes rapid yet uniform expansion at velocities between 2,900 and 3,300 fps—making it ideal for varmint-to-medium-game hunting and precision target shooting. The soft-point tip ensures predictable terminal upset while the Spitzer design maintains excellent ballistic coefficients and wind resistance.

Manufactured to Sierra’s stringent component standards—140.0 grains weight, 0.284″ diameter, approximately 1.070″ overall length, and a sectional density near 0.277—the bullet features consistent jacket thickness, tight concentricity, and precise meplat alignment. These qualities support stable chamber pressures, repeatable seating, and sub‑MOA accuracy when fine-tuning handloads.

Optimized for barrels with twist rates between 1:9 and 1:10, the Sierra 284 Cal 7mm 140gr SPT excels at muzzle velocities from 2,900 to 3,200 fps. Shooters report flat shooting trajectories, tight groups, and dependable terminal energy on predators and medium game species at ranges up to 500 yards.

As a component bullet, the Sierra 284 Cal 7mm 140gr SPT gives reloaders full control over powder selection, primer choice, and seating depth—enabling custom load development tailored to field conditions, recoil preferences, and terminal performance goals. It is not factory-loaded ammunition, but a high-performance soft-point Spitzer component crafted for versatile hunting and precision applications in .284‑caliber rifles.