Any one loading for a 20 bore Paradox / Fauneta type gun?

I am looking for some loading ideas...for a late model (1930) 20 bore rifled choke SxS.

I have seen a bunch of info for the 12 bore guns but not much on the 20's. I am looking to come close to original Westley Richards ballistics 425gr bullet @ 1500 fps.


Dave Weber
doublegunshop.com
DoubleGun Evangelist
In Charge But Not Responsible