The plan is card and fiber wads, I have PB and 7625, and the load data is in LUP. I'll just keep pressures for that down around 7,000 too, I would think that should be safe.
Tim
if you have supplies of both PB and 7625, this reference will offer you numerous loads - down to pressures that are amazingly low. my one comment regarding the gun is that there are older bore proofs 13/1 (right tube), and a faint 12 (?) on the left tube. that could be a tube originally as tight as .719", and last time through the process measured .736" - and that's the exact scenario that makes me keenly interested in knowing wall thickness. i have several guns in this same general condition - nicely cleaned up bores - but marginal wall thickness. i think it smart to take that in consideration with load pressures.
http://pdf.textfiles.com/manuals/FIREARMS/imr_reloading.pdfvery handsome old gun, use it in good health.