Sierra 338 Cal 250gr SBT GameKing

Sierra 338 Cal 250gr SBT GameKing

The Sierra 338 Cal 250gr SBT GameKing is a magnum-grade component bullet designed for long-range hunting and precision handloads in .338‑caliber platforms. As part of Sierra’s renowned GameKing line, this .338‑inch, 250‑grain Spitzer boat-tail bullet delivers exceptional aerodynamic efficiency, deep penetration, and match-grade accuracy.

Featuring a streamlined Spitzer ogive and tapered boat-tail base, the 338 Cal 250gr SBT achieves a G1 ballistic coefficient of approximately 0.550, promoting flatter trajectories and reduced wind drift at extended ranges. Its .338″ diameter is compatible with popular cartridges including .338 Winchester Magnum, .338 Lapua Magnum, and .338 Federal, making it a versatile choice for magnum rifles.

Manufactured to tight factory tolerances—250.0 grains weight, 0.338″ diameter, approximately 1.455″ overall length, and a sectional density of about 0.369—the bullet exhibits consistent jacket thickness, concentricity, and precise boat-tail alignment. These attributes enhance in-flight stability and support repeatable group accuracy in precision hunting and target rifles.

Optimized for twist rates between 1:9 and 1:10, this bullet delivers sub‑MOA performance in bolt-action and precision semi-auto platforms. Its robust construction supports deep penetration, making it ideal for large game such as elk, moose, and bear. Handloaders benefit from its ability to maintain consistent velocities while delivering terminal effectiveness downrange.

As a component bullet, the Sierra 338 Cal 250gr SBT GameKing gives reloaders full control over powder selection, primer choice, and seating depth—enabling tailored load development for trajectory, recoil, and terminal performance. It is not factory-loaded ammunition; rather, it is built for premium customization and match-quality outcomes.

In summary, the Sierra 338 Cal 250gr SBT GameKing is an elite Spitzer boat-tail bullet offering aerodynamic excellence, precision accuracy, and deep penetration. Ideal for handloaders pursuing magnum-level performance in hunting and long-range shooting, this component delivers consistent, high-BC reliability in .338 platforms.