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6.5 WBY RPM (Rebated Precision Magnum)

Weatherby has traditionally designed and built ultra-high velocity cartridges with unique case designs-belted magnums with a double-radius shoulder. This is seen in all of the existing Weatherby cartridges until now.

The Mark V 6 lug standard action has been one of Weatherbys best-kept secrets for years. The goal of the 6.5 WBY RPM (Rebated Precision Magnum) was initially based around maximizing the potential of this great lightweight action. Setting out to produce the best backcountry rifle and cartridge combination ever, it was a project not taken lightly. At its core, Weatherby prides itself in ballistic superiority. The rebated rim helps achieve the desired velocity and energy they were looking for while remaining compatible with the 6 lug action.

The 6.5 WBY RPM packs a punch and is capable of being chambered in Weatherbys new sub five pound rifle, the Mark V Backcountry Ti. This combination offers maximum downrange performance in the lightest rifle possible. After years of development, the 6.5 WBY RPM combination achieves the weight savings, ballistic performance and price that cannot be found in a rifle anywhere else.




The 6.5 WBY RPM is based on a lengthened version of the existing 284 Winchester. This cartridge has a rebated rim, making it compatible with standard 30-06 bolt faces and reloading equipment. However, the large body diameter, low body taper, and 35-degree shoulder mean that case capacity is greatly increased, leading to higher velocities.

In addition, bullet innovation in the 6.5mm category are highly efficient with less drop and wind deflection than many heavier calibers. All these details culminate into a cartridge that delivers 1,500 foot pounds of energy at 500 yards capable of ethically taking big game animals across the globe