Had one suggestion on utilizing as 6.5-06....
So...what ARE you going to do? It's interesting.
That might be a tricky conversion since the rim of a 6.5-06 is .473 and the X68 rim is ,512 inches. It would probably be easier to modify to a belted magnum than a 06 sized case.
With brass available I would really consider getting it and a good supply of brass. The cartridge nips closely on the heels of the 264 Win Mag and has a slightly rebated rim without a belt.
That is one cartridge rarely seen in this country.