#RebatedPrecisionMagnum
SAAMI Specs Of The New 25 Weatherby RPM Cartridge
All Weatherby RPM cartridges have a rebated rim of .473" diameter with a .500” case body. These are basically the .284 Winchester case head and base dimensions. This case design allows using standard 30-06 Springfield/308 Winchester bolts but have a larger case capacity at a given case length. With an overall length of 3.34", the 25 Weatherby RPM is a standard/long action length cartridge that, according to Weatherby, provides magnum performance. The new 25 Weatherby RPM is designed with a focus on shooting heavier, high-BC bullets: the recommended twist rate is 1:7.5" and the case length of 2.4” results in ample room over the case (.94”) for those long ogive bullets. To download the full SAAMI cartridge and chamber drawings document for the 25 WBY RPM, click here.
