Proper moulds for the 750 gr. Fosbery Bullet are available from a maker in Austrailia. I don't have the email address right now, but you might PM Marrikai to get it. Holland and Holland has a daunting task ahead of them in regards to ammunition. They must make cartridges that will regulate in Paradox guns they made a hundred years ago AND regulate a gun they are building now for use with the same ammunition. My best guess is that you would have the greatest success by loading for your own gun. Best of luck. The Paradox is a wonderful gun.

Best regards,
David