Sierra 50 Cal 400gr JSP

Sierra 50 Cal 400gr JSP

The Sierra 50 Cal 400gr JSP is a heavyweight jacketed soft-point component bullet designed for hunters and handloaders demanding deep penetration, controlled expansion, and reliable terminal performance in large-caliber platforms. With a .500-inch diameter and 400-grain weight, this bullet is optimized for use in powerful firearms such as .50 BMG rifles, lever-action .50‑70 Government arms, and other heavy-hitting .50-caliber applications.

Constructed with a precision-engineered copper-alloy jacket surrounding a lead core, the soft-point (JSP) design exposes a portion of the lead nose while retaining jacket support around the bullet’s shank. Upon impact, this configuration encourages gradual and uniform expansion, delivering wide wound channels with significant penetration—ideal for large game or tactical field use where energy transfer and tissue disruption are needed.

Manufactured to Sierra’s exacting component standards—400.0 grains weight, 0.500″ diameter, and a sectional density near 0.320—the bullet features consistent jacket thickness, concentric seating geometry, and tight tolerance control. These attributes support stable chamber pressures, dependable feeding, and accurate shot placement in precision load development.

Designed for velocities ranging from 1,800 to 2,200 fps typical of .50 BMG and heavy .50-caliber rifles, the 400gr JSP retains structural integrity on large-frame targets while providing controlled expansion. Its combined mass and design also make it suitable for lever-action hunting platforms at moderate speeds.

As a component bullet, the Sierra 50 Cal 400gr JSP offers handloaders total control over powder selection, primer type, and seating depth—enabling customized load recipes tailored to recoil management, trajectory, and terminal effect. It is not factory-loaded ammunition, but a premium JSP component built for hard-hitting performance and versatility in .50-caliber systems.