Sierra 8mm 150gr SPT

Sierra 8mm 150gr SPT

The Sierra 8mm 150gr SPT is a premium soft-point Spitzer component bullet designed for handloaders who need controlled expansion, flat trajectories, and reliable penetration in 8mm cartridges. Its .323‑inch diameter and 150‑grain soft-point Spitzer profile make it ideal for medium-game hunting, target work, and general-purpose shooting in platforms such as 8×57 Mauser, 8mm Remington Magnum, and wildcat calibers.

Featuring a tapered Spitzer nose and thick copper-alloy jacket over a lead core, the 8mm 150gr SPT initiates consistent expansion upon impact while preserving sufficient weight for deep energy transfer. The soft-point tip ensures dependable mushrooming, making it well-suited for ethical harvests on deer, antelope, and similar-size game.

Manufactured to tight component tolerances—150.0 grains weight, 0.323″ diameter, approximately 1.080″ overall length, and a sectional density near 0.240—the bullet maintains precise jacket thickness, concentric construction, and uniform meplat alignment. This quality craftsmanship supports accurate seating, consistent chamber pressure, and repeatable performance in handloads.

Optimized for bore twist rates between 1:10 and 1:11, the 150gr SPT delivers sub‑MOA accuracy in bolt-action and lever-action rifles. At velocities of approximately 2,600 to 2,800 fps, it provides reliable lethality with minimal barrel wear. Reloaders commend its straight-line flight and tight groupings when seated with match primers and quality brass.

As a component bullet, the Sierra 8mm 150gr SPT gives handloaders full control over powder selection, primer choice, and seating depth—allowing tailored load development for trajectory, recoil, and terminal performance. This bullet is not factory-loaded ammunition but a high-quality soft-point Spitzer component for careful load customization.