6.5 Weatherby RPM, not the 6.5mm-300 Weatherby Magnum
New for 2020! A Weatherby First time on a major production*.
The 6.5Weatherby RPM is Weatherby's first belt-less case cartridge for major production, and also with a rebated rim.
The 6.5 RPM, RPM for Rebated Precision Magnum and was designed  to produce magnum performance in the
Weatherby Mark V (under 5 pound) rifles. ( In other words, "Magnum" performance on a 30-06 platform bolt).
Pushing a 140 grain projectile to over 3,000 feet per second with almost 2900 foot pounds per square in of energy
in a light rifle should create some interest in this new caliber .
* The 220 Rocket was a belt-less case, but it was wildcat cartridge designed by Weatherby and not a production cartridge.
Single American rifle cartridges

On the top right of the photo
For Size comparison:
Left to Right:
6.5 Weatherby RPM
6.5 Creedmore