Max,
I think that H&H had two loadings for the 12 Bore Paradox. JAZ may have better information than I. As long as the regulation of your gun has not been fooled with over the years it should regulate with modern loads of the 750 gr. Fosbery projectile at 1050 fps., in theroy. There are other factors that affect regulation in the Paradox, such as the wad used, that do not apply to double rifles. I agree with JAZ, load for your own gun. There is some trial and error in getting the proper wad to work, but it is not technically difficult. They were, after all, made to be loaded by hand in the most remote corners of the world.
Best regards,
David
