Sierra 8mm 175gr SPT

Sierra 8mm 175gr SPT

The Sierra 8mm 175gr SPT is a premium component bullet designed for handloaders and hunters seeking flat trajectories, controlled expansion, and accuracy in 8mm cartridges. Featuring a .323‑inch diameter and a 175‑grain soft‑point Spitzer profile, this bullet blends aerodynamic efficiency with terminal penetration—ideal for medium to large game in platforms like 8×57 Mauser, 8mm Rem. Magnum, and wildcats.

With a tapered Spitzer nose and thick copper-alloy jacket over a lead core, the 8mm 175gr SPT initiates consistent expansion upon impact while retaining weight for deep penetration. The soft-point Spitzer shape enhances ballistic performance by reducing drag and improving velocity retention at extended ranges compared to round-nose bullets.

Manufactured to tight component tolerances—175.0 grains weight, 0.323″ diameter, approximately 1.115″ overall length, and a sectional density near 0.280—the bullet provides uniform jacket thickness, precise meplat alignment, and concentric construction. These features support repeatable seating behavior, stable pressure curves, and tight group performance.

Optimized for twist rates between 1:10 and 1:11, the Sierra 8mm 175gr SPT performs best at muzzle velocities of 2,700–2,900 fps. Handloaders report sub‑MOA accuracy and reliable terminal effect on deer and antelope-sized game when using quality brass, primers, and fine-tuned powder charges.

As a component bullet, the Sierra 8mm 175gr SPT gives reloaders full control over powder, primer, and seating depth—facilitating tailored load development for recoil, velocity, and terminal performance. It is not factory-loaded ammunition but a high-quality soft-point Spitzer component built for serious hunting and target purposes.