That's the range where most rifles turn in their best accuracy. While there's always the occasional example that shoots its best right on the peg, it's the exception.
If you hunt Wyoming or somewhere similar maybe you need that extra 200 fps to increase you max point blank range.
In the instances where an additional 200-300 fps is required for the distances and trajectories involved, rather than ovestressing a rifle by turning up the heat, it's time to step up to the next caliber. i.e. .308 to .30-06...30-06 to 7mm or .300 Magnum.
To "Err on the side of caution" is sage advice when we're essentially touching off a controlled explosion 18 inches from the ends of our noses...or so it would seem.