In the realm of high-performance hunting cartridges, the 338 Weatherby RPM (Rebated Precision Magnum) stands as a testament to engineering excellence and innovation. Introduced in 2022, this cartridge was designed with one singular objective: to maximize magnum potential within the confines of a lightweight configuration. It achieves this through its seamless integration with the Mark V 6 Lug action—a platform revered for its strength-to-weight ratio.
The genesis of the 338 RPM lies in its ancestry; it is derived from necking up the respected 6.5 RPM to accommodate a .338 caliber bullet. This transformation results in an impressive display of ballistic prowess suitable for taking down any big game across North America’s diverse terrains.
Key to its performance is its structural design—the case features a large body diameter complemented by low body taper and capped off with a precise 35-degree shoulder angle. This architecture allows for greater powder capacity, which directly translates into higher velocities and enhanced terminal performance on target.
For those who venture into backcountry expeditions seeking formidable yet portable firepower, the introduction of this cartridge marks an era where power does not come at the expense of weight or maneuverability. The Weatherby name continues to forge ahead, providing hunters with tools that echo reliability and superior craftsmanship.