Isn't that the 338 O'Connor?
It would be but I am not sure that ever got off the ground. PTG had no record of a .30 cal flavour, which seemed very odd to me... I like the X57 case and can't see why a .30 cal would not be excellent... sure you can have a .308 or a .30/06, but variety is the spice of a Gun Nutz life.