The 6x47 IS NOT the .222 Remington necked up.
It is the .222 Remington MAGNUM necked up.
The .222 Rem Mag case length is 1.850" whereas the case length of the .223 is 1.760".
I just bought a 6x47 today in a LH Kimber 84.
Dies, brass (.222 Rem Mag), and bullets are on the way from Grafs.