Do a lot of guys shoot 24" AR rifles for the roles the 6mmARC is to fill? The chambering doesn't seem useless or anything, but I'm a little less interested when you start carving off 150fps for use in a typical 20" rifle. Still has a leg up on 5.56 for hunting use, but I'd rather bite the bullet and spend the extra for a 20" 6.5CM on an AR10 if deer is on the menu and you want to keep recoil down.
