I wrote this really nice reply to your post but for what ever reason my blasted connection to the internet was discontinued. Suffice it to say that the .280 is a awsome cartridge and I strongly, strongly disagree that it is "almost obsolete". It isn't the most popular cartridge but is isn't obsolete. I've owned one for about 3-4 years and its my go to hunting rifle. Hoping to get my hands on a .280 AI