Seems like a great little cartridge. It really makes more sense to me (Biased by living in the west and reloading) than many more popular rounds (.243, 7mm-08, 308, .270).
It is a great cartridge. Mine (Ruger 77 all weather) kicks about like my .243 and shoots more like a 25-06 with light bullets and a 270 with the heavy ones.
Should be more popular than it is and would probably suffice for 90% of hunters in the US today.