The Weatherby Select Plus .338 Weatherby Rebated Precision Magnum (.338 WBY RPM) 225-grain AccuBond Spitzer Soft Point Brass 20-round box is a flagship centerfire rifle cartridge engineered specifically for backcountry mountain hunting, trophy elk pursuits, moose, and large dangerous game. A primary constraint in high-altitude mountain hunting is the weight penalty of traditional long-action magnum platforms needed to deliver lethal downrange energy. Weatherby resolves this tradeoff through the non-belted .338 WBY RPM case design, which houses magnum-class powder charges within a standard-action footprint to deliver flat trajectories, deep tissue penetration, and severe stopping power from lightweight mountain rifles.
The core technical advantage relies on the 225-grain Nosler AccuBond bullet architecture. Featuring a white polymer tip, a sleek boat-tail base, and a proprietary thermal bonding process, the lead-alloy core is permanently fused to the copper jacket. Upon high-velocity contact, the polymer tip initiates uniform expansion while the bonded core prevents jacket-core separation, allowing the bullet to retain up to 65% to 70%+ of its total mass. This structural integrity enables the projectile to plow through thick hide, heavy rib structures, and dense shoulder bone while preserving downrange momentum and directional stability.
Launching its heavy 225-grain AccuBond projectile at a factory-rated 2,825 FPS muzzle velocity (generating 3,988 ft-lbs of muzzle energy), this Select Plus loading maximizes case capacity through a 35-degree shoulder angle and a rebated rim profile. This non-belted cartridge geometry ensures smooth feeding from standard-length actions, tight headspacing, and effortless bolt cycling. Assembled using precision-drawn Weatherby brass cases, clean-burning propellants, and non-corrosive match Boxer primers, the cartridge guarantees uniform chamber sealing and reliable extraction across extreme ambient temperature fluctuations.
Key Benefits
- Non-Belted .338 WBY RPM Case: Delivers true magnum velocity and energy from lightweight, standard-action mountain rifle platforms.
- Chemically Bonded AccuBond Core: Prevents jacket separation to maintain high weight retention and deep penetration through heavy bone.
- White Polymer Tip: Resists tip deformation in the magazine, flattens trajectory, and triggers consistent expansion on impact.
- 3,988 Ft-Lbs Muzzle Energy: Provides massive knockdown power and wind resistance for long-range big game hunting.
Technical Specification
- Caliber: .338 Weatherby Rebated Precision Magnum (.338 WBY RPM)
- Ballistics: 2,825 FPS Muzzle Velocity | 3,988 Ft-Lbs Muzzle Energy
- Projectile: 225 Grain | Nosler AccuBond | Spitzer Soft Point (SP) | White Polymer Tip | Chemically Bonded Core | Boat-Tail Base
- Case/Primer: Precision-Drawn Weatherby Virgin Brass | Non-Belted Rebated Rim | Clean-Burning Powder | Non-Corrosive Match Boxer Primed
- Logistics: 20 Rounds Per Box | Weatherby Select Plus Ammunition Series
- Dimensions: Standard Action Footprint | 35-Degree Shoulder Geometry | SKU: R4570G
- Application: Backcountry Big Game Hunting, Trophy Elk, Moose, Grizzly Bear, and Caribou
- Standards: SAAMI Compliant | Weatherby Factory Precision Quality Control Standards
If you're running a .338 WBY RPM platform and need consistent long-range energy with controlled penetration on large game, this load addresses the limitations of standard cartridges without increasing rifle weight. Get verified performance and dependable lot consistency from SMKW, a trusted source for field-proven ammunition.
