Dear Max,
The Dixie Slugs Terminator Series are excellent loads, but NOT for old Paradox Guns. They're designed to be used in MODERN GUNS.

You would probably be much better off to order a projectile mold or complete tool set from H&H to load your own or ask Dixie Slugs to load the correct H&H slug for you...
One of the guys on this forum shared a diagram with me a while back. You might be able to get a mold cut for this paradox bullet...



There's an excellent article on loading Paradox slugs for the H&H in Handloader Magazine #227, FEB, 2004.

According to Ross Seyfried, he finally got his 12bore Paradox to shoot well after he sized his slugs so they would slide down the barrels by their own weight to the rifling...

GOOD LUCK & HAPPY NEW YEAR!