Time to start asking a bunch of questions about the rifle. Typically Paradox guns have about .045" of constriction at the chokes with most H&H built guns having a bore diameter of .735" and chokes in the .690" range. I would measure the bore and constriction carefully before proceeding. The H&H cartridges are for the mildest loading at only 1050 fps. I believe from speaking to you in the past about this gun that it is set up for the 1250 fps load. This is a long winded way of saying I am pretty sure you will need to work up loads for that gun. Once you know bore diameter and constriction you can start looking for a mold, or have one made. Getting them to shoot is half the fun. Good luck!
Steve