So ever since I got the .277 Wolverine I have been wanting to get another Wildcat in the AR-15 and figured I would make a step up and wondered across the 7mm Valkyrie. It is pretty much a 7mm-08 in an Ar-15 platform. The parent case is a 6.5X47 Lapua and out of a 24" barrel they have 140gr bullets cruising at 2850 (max) and 130s pushing 3000 fps (max). Seems like a lot of power for the Ar-15 and could make out to be a nice light weight hunting AR vs the alternative of toting an AR10. Anyways here are a few pictures of the cartridge. More than likely I will probably go with a 20" barrel still haven't decided yet but the 20" barrel seems like you are not loosing that much velocity compared with the 24"
Wildcat+ AR+ reloading= bad addiction
http://www.7mmvalkyrie.com/