It very well may be, particularly from an efficiency standpoint. The 240 Weatherby is a little faster, but brass is expensive and barrel life is shorter. The 6MM-284 is a little faster yet and is capable of phenomenal long range accuracy, but has only about a 1200 round barrel life.

I personally shoot the 6MM-284 and try to avoid high volume varmint hunting pursuits. I got ten years out of my last barrel. Best long range coyote, antelope, and deer combo caliber out there, IMO.