The Hornady 7.62 Cal .310 123 gr SP InterLock® (MPN: 3140) provides handloaders with expanding, hunting-grade projectiles designed specifically for rifles chambered in 7.62x39mm and other nominal .310-inch bore firearms. Featuring a traditional Spire Point profile with an exposed lead tip, this 123-grain component projectile combines controlled terminal expansion with aerodynamic flight characteristics. An integrated cannelure ensures a secure case crimp for reliable cycling through magazine-fed actions, making it well suited for hunting small to medium game within standard field ranges.

Key Features

• InterLock® Mechanism: Built with an internal ring raised inside the jacket that locks directly into the lead core, preventing core-jacket separation upon impact to preserve weight retention and energy transfer.
• Controlled Terminal Expansion: Incorporates internal jacket grooves cut into the nose section to ensure predictable mushrooming even at reduced terminal velocities, supported by a progressively tapered jacket wall.
• Secant Ogive Aerodynamics: Utilises Hornady’s secant ogive geometry to minimize atmospheric drag, providing stable trajectory and a G1 ballistic coefficient of 0.252.
• Integrated Cannelure: Features a dedicated crimping channel that prevents projectile setback or movement during magazine feeding and recoil.

Specifications

• Calibre / Bullet Diameter: 7.62mm / .310 in (7.87 mm)
• Bullet Weight: 123 grains (7.97 g)
• Bullet Profile: Spire Point (SP) with exposed lead tip
• Ballistic Coefficient (G1): 0.252
• Sectional Density: 0.183
• Quantity: 100 projectiles per box (unloaded reloading components)
• Primary Cartridge Compatibility: 7.62x39mm (also suitable for select light-load .303 British or 7.62x54R rifles with .310 to .311 in bores)

Who is the Hornady .310 7.62 Cal 123 Grain Sp Interlock Bullets 100 Pack – For 7.62x39 for?

• 7.62x39mm Rifle Reloaders — Sized precisely at a .310 in diameter to properly seal Com-Bloc bore dimensions found in rifles like the CZ 527, Ruger American, and SKS, ensuring consistent pressures and bore engagement across every 100-pack box of reloading bullet projectiles.
• Small to Medium Game Hunters — Features a 123-grain weight engineered for reliable expansion on game weighing between 50 and 300 lbs (~23 to 136 kg), providing controlled penetration for medium feral pigs, wild goats, and fallow deer.

Less suitable for: Target game exceeding 300 lbs (such as mature sambar deer, heavy scrub bulls, or large trophy boars), shooting engagements beyond 200 to 250 metres where velocity drops below reliable expansion thresholds, or use in standard western .308 in or oversized .312 in+ bores; for these conditions, heavier .308-calibre monolithic copper or bonded core projectiles, or larger .312-diameter hunting bullets, are better suited.