Tom:
A good source of diagrams shot with Paradox guns is 'The Field' trials held at the time, and widely reported in period literature, not the least of which was 'The Field' sporting newspaper. Holland's Paradox performed very well, and the diagrams were reproduced in their catalogues for decades afterwards. I'm away from my library at the moment, but will report details later if no-one else beats me to it.
Graeme Wright includes a good discussion on Paradox accuracy in the second edition of his book 'Shooting the British Double Rifle', definitely worth buying a copy if you don't already have it. Again, I'll report details later when I have access to the material, if no-one else comes forth.
