I have had the design for about a decade. I have recently begun experiments again and I am far from done. I have a 26” McGowen barrel mounted to a Savage action. As I said, 3450 with a 165 grain Ernie easy to get with no pressure signs. I’ll keep y’all posted.I have a wildcat 6.5mm based on that case. It matches the .264 Win Mag. Therefore I suppose your wildcat would match the .30-338 Win Mag.