OzFclass

http://www.nosler.com/news-and-articles/2013/11/22/the-26-nosler

"this is the quintessential deer, antelope and long-range target cartridge available on the market today.” –Bob Nosler, CEO/President Nosler, Inc. "

If it is a 280 just necked down the it will be pretty hard on barrels...

it would take a bigger case than the 280 Ackley necked down to achieve those ballistics without a special powder.
this would make it even harder on barrels than a 6.5/284, or even a 264 win mag which cannot do those speeds with that bullet wt in hunting length barrels.
probably more suited to small to medium game than target use.
keep safe,
bruce.

Apparently it's a 6.5 SAUM/wsm thing....
Invented by barrel makers you'd think.

It has not been released officially until the shot show but think of a 6.5mm Blaser cartridge with 107gn H20 capacity.