Where I hunt there is often a lot of wind, and the ranges get long. For that reason, when I am not using an AR, I reach for my 6mm Remington.
An 85 grain pill at 3430 does not get blown around nearly as hard and really puts the smack down on coyotes.
Best is subjective. Best for close cover hunting, where 50 yard shots are most common, or best when you have a 12mph crosswind and dogs hold up at 500 yards..
Heck I even like the .260 for dropping dogs way out across the sagebrush.
