Steve - that is one great find and a beautiful pair of handguns. Keep them well hidden in case the forces of evil win the election.
I loaded up some 295-300 gn cast semi-wadcutters over 17.5 gns of 2400 for a nice accurate and easy shooting load. I think they clock somewhere around 1100'/sec from my 4" M29. Good luck at Wild Hill with that load and even if you can't get close enough with the 44 I know your 35 will bring you home the bacon................. Mikey.