Hornady Sub-X Features The Hornady Sub-X bullet solves a problem many conventional projectiles struggle with reliable expansion at the reduced impact velocities subsonic ammunition produces where standard hollow point and soft point designs often fail to open and instead punch through like a solid. At 307 grains and a .338 diameter this heavy-for-caliber bullet retains enough mass and momentum at subsonic speeds to still deliver meaningful terminal performance despite traveling well below the sound barrier. That heavier weight also helps stabilize the bullet s flight path at the lower velocities subsonic loads are built around. Handloaders working with suppressed .338 caliber rifles will find the Sub-X purpose-built for exactly this application giving them a component that expands reliably without needing to rely on velocity alone for terminal effect. Packaged 50 bullets to a box this component gives reloaders a solid supply for developing and refining subsonic loads suited to their particular suppressor and rifle combination. Hornady s engineering focus on subsonic-specific bullet design makes the Sub-X a trusted choice among the growing community of suppressor shooters who demand both quiet operation and reliable downrange performance. Hornady Sub-X Specifications Brand: Hornady Model: Sub-X Caliber: 338 Cal Bullet Diameter: .338 Bullet Weight: 307 gr Count Per Box: 50 Available At: GrabAGun