You can extend your PBR out to 250 or even 300 yards
Damn near any necked round used for hunting medium to large game has a MPBR over 250 yards. The flat-nose .30-30 comes close, even.
The .270 WSM's claim to fame is that it pushes PBR up past 300, into the land of the Weatherby Magnums, Remington Ultra Magnums, etc.
Does an extra 50 yards of PBR matter? I mean, will you be taking quick shots at more than 275 yards without knowing the range, but also knowing that the range is less than 325? I suppose that depends on terrain and other such factors. Once you get past 200 yards, I'll be the first to admit that I have no really good idea of how far away something is without the Nikon laser prosthetic in my pocket.