Weatherby Select Plus 338 Wby RPM Hornady InterLock 20rd 225gr H338255IL

The Weatherby Select Plus .338 Weatherby RPM 225-grain Hornady InterLock load is a game-changer for backcountry hunters who need maximum stopping power without packing a heavy, cumbersome rifle. Historically, getting true large-bore magnum energy meant carrying a heavy, long-action rifle with an inefficient belted shell. This innovative cartridge completely rewrites that rule, combining a sleek, beltless case with a hard-hitting 225-grain projectile to deliver bone-crushing energy from a lightweight, fast-handling mountain rifle.

The technical advantage centers on pairing a mechanically locked bullet with Weatherby's advanced Rebated Precision Magnum (RPM) case architecture. The cartridge features a steep 35° shoulder, minimal body taper, and a rebated rim that fits standard bolt faces seamlessly—maximizing powder capacity while keeping pressures completely stable. Up front, the Hornady InterLock projectile uses a specialized internal ring that physically anchors the lead core to the copper jacket. This structural bond ensures the bullet retains its weight and mass upon a high-velocity impact rather than breaking apart.

Launching its heavy 225-grain payload at a powerful 2,800 FPS, this load translates massive weight and velocity into raw downrange momentum. Upon contact, the exposed lead soft point initiates immediate, controlled mushrooming to create a massive wound channel. Because the jacket and core stay locked together, the bullet refuses to flatten out or stall, driving straight and deep through the thickest hide, dense muscle tissue, and heavy shoulder bone of large-bodied North American big game.

Key Benefits

• Mechanical InterLock Core: Internal jacket ring locks the lead core in place, preventing fragmentation and ensuring deep barrier penetration.
• Exposed Lead Soft Point: Heavy-duty traditional nose design initiates reliable, uniform downrange expansion and massive energy transfer.
• Optimized RPM Case Efficiency: Smart 35° shoulder design packs true magnum performance and uniform burn rates into a standard-action bolt footprint.
• Backcountry Rifle Performance: Specifically engineered to deliver hard-hitting, magnum-level velocities from compact, shorter-barreled mountain rifles.

Technical Specification

• Ballistics: .338 Weatherby RPM | 2,800 FPS Muzzle Velocity | ~3,916 ft-lbs Muzzle Energy
• Projectile: 225 Grain | Hornady InterLock | Mechanically Bonded Lead Core Soft Point (SP)
• Case/Primer: Premium Weatherby RPM Brass | Rebated Rim | Non-Corrosive Magnum Primer | Reloadable
• Logistics: 20 Rounds Per Box | Select Plus Factory Premium Series
• Dimensions: .338 Wby RPM | ~1.55 lbs Per Box | SKU: H338255IL
• Application: Large Big Game Hunting | Elk, Moose, Bear, & Caribou | Lightweight Backcountry Hunting
• Standards: SAAMI Compliant | Match-Grade Hunting Tolerances

SMKW delivers verified, factory-direct ammunition from trusted manufacturers like Weatherby, ensuring consistency, compliance, and field-ready performance. When precision and terminal reliability matter, source your .338 Wby RPM from SMKW with confidence.