THE ALL-NEW 6.5 WEATHERBY REBATED Precision Magnum (WBY RPM) cartridge is a vast departure from classic Weatherby design. The 6.5 WBY RPM has no belt, no double-radius shoulder, and no freebore. It’s still a hotrod, but that’s about all it has in common with its traditional belted-magnum, Venturi-shouldered, generously freebored ancestors.
The cartridge has a steep, 35.25-degree shoulder, nearly parallel sides, and a rebated rim. For those of you familiar with the 6.5-284 Norma, imagine a stretched-out version that makes the most of a long rifle action, provides magnum 6.5mm ballistics, and is compatible with a standard 0.473-inch-diameter (.30-06 size) boltface.
So, what inspired this dramatic departure from traditional Weatherby engineering? The 6.5 WBY RPM cartridge was designed for a new, sub-five-pound mountain rifle built on a titanium version of…
