The Weatherby Select .240 Weatherby Magnum 100-grain Hornady InterLock Jacketed Soft Point (JSP) Brass 20-round box is a magnum centerfire rifle cartridge engineered specifically for harvesting whitetail deer, pronghorn, and medium game across wide open terrain where ultra-flat trajectories and long-range kinetic energy transfer are required. A primary friction point in long-range open-country shooting is rapid velocity decay, which causes steep bullet drop and wind drift downrange. Weatherby resolves these ballistics challenges by pairing its precision belted brass cases with the Hornady InterLock projectile, delivering high muzzle velocity, reduced time-of-flight, and mechanical jacket-core retention under magnum impact pressures.
The primary technical advantage lies in the Hornady InterLock projectile architecture, paired with a 0.405 G1 ballistic coefficient. Featuring an internal raised ring and a targeted knurled cannelure, the InterLock design mechanically anchors the lead core inside the copper jacket during expansion. This mechanical lock prevents jacket-core separation even at extreme impact speeds, ensuring the bullet retains its structural mass to drive deep through hide, muscle, and bone rather than fragmenting prematurely upon contact.
Launching its 100-grain soft point bullet at a blistering 3,275 FPS, this Weatherby Select loading generates flat downrange flight paths and heavy hydrostatic shock to defeat long-range targets. Assembled using premium reloadable Weatherby/Norma belted brass cases, clean-burning propellants, and non-corrosive Boxer primers, it guarantees consistent chamber pressure, uniform ignition, and positive extraction in bolt-action rifles chambered in .240 Weatherby Magnum. It is a premier selection for pronghorn plains, beanfield deer stands, and open-country big game pursuit.
Key Benefits
- Hornady InterLock Projectile: Mechanical ring and cannelure lock the core to the jacket to prevent high-velocity separation.
- 3,275 FPS Blistering Velocity: High speed reduces time-of-flight and wind deflection for ultra-flat downrange trajectories.
- 0.405 G1 Ballistic Coefficient: Streamlined 100-grain profile preserves kinetic energy and accuracy at extended distances.
- Precision Reloadable Belted Brass: High-grade brass cases deliver uniform chamber sealing, smooth feeding, and long reloadable life.
Technical Specification
- Ballistics: .240 Weatherby Magnum | 3,275 FPS Muzzle Velocity | 0.405 G1 Ballistic Coefficient | Magnum Hunting Profile
- Projectile: 100 Grain | Hornady InterLock® | Jacketed Soft Point (JSP) | Cannelured | Mechanical Lock Ring
- Case/Primer: Precision-Drawn Virgin Reloadable Belted Brass Case | Non-Corrosive Boxer Primed
- Logistics: 20 Rounds Per Box | Weatherby Select Ammunition Series
- Dimensions: Standard .240 Wby Mag Geometry | Bolt-Action Rifle Compatible | SKU: H240100IL
- Application: Open-Country Medium Game Hunting, Whitetail Deer, Pronghorn Antelope, and Long-Range Varmint
- Standards: SAAMI Compliant | Weatherby Factory Quality Control Benchmarks
Secure consistent long-range hunting performance with Weatherby Select ammunition from SMKW, a trusted source for verified, specification-driven shooting products.
