Sierra 284 Cal 7mm 140gr HPBT

Sierra 284 Cal 7mm 140gr HPBT

The Sierra 284 Cal 7mm 140gr HPBT is a precision-crafted bullet component designed for long-range accuracy in a wide range of 7mm rifle cartridges. Built with a hollow-point boat-tail profile, this bullet is tailored for handloaders who demand exceptional consistency and match-grade performance. It is not factory-loaded ammunition, but a high-performance component ideal for developing custom loads in cartridges like 7mm-08 Remington, 284 Winchester, and 7mm Rem Mag.

At 140gr, the Sierra 284 Cal 7mm 140gr HPBT offers a sectional density of approximately 0.286 and a G1 ballistic coefficient near 0.517. These properties support flat trajectories, strong wind resistance, and efficient energy transfer at long distances. The bullet’s streamlined ogive and tapered boat-tail base reduce drag and enhance in-flight stability, allowing shooters to maintain sub-MOA groupings across extended ranges.

The Sierra 284 Cal 7mm 140gr HPBT is engineered for rifles with a twist rate of 1:9″ or faster. Its consistent base-to-ogive measurements and precise jacket concentricity contribute to uniform seating and minimal shot-to-shot variation. This component feeds reliably from standard magazines and is suitable for both bolt-action and semi-automatic platforms configured for 7mm cartridges.

Handloaders utilizing the Sierra 284 Cal 7mm 140gr HPBT report reliable performance and repeatable accuracy across a broad range of powders and seating depths. It excels in competitive target shooting and precision applications where long-range stability is critical. The hollow-point tip promotes consistent ignition and optimized center of mass, while the boat-tail ensures minimal velocity loss during flight.

While optimized for target shooting, the Sierra 284 Cal 7mm 140gr HPBT is occasionally used for medium game where controlled expansion is not a primary requirement. It is packaged in 100-count boxes and provides a consistent, high-quality option for reloaders seeking premium results in 284 caliber rifles. Its combination of aerodynamic form, match-grade construction, and precision manufacturing makes it a reliable choice for long-range 7mm handloads.