The goal of the 6.5 WBY RPM 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 our core, Weatherby prides itself in ballistic superiority. The rebated rim helps achieve the desired velocity and energy we were looking for while remaining compatible with our 6 lug action. The 6.5 WBY RPM packs a punch and is capable of being chambered in Weatherby�s new sub-five-pound rifle, the Mark V Backcountry Ti. This combination offers maximum downrange performance in the lightest rifle possible.�