Bill,

That sounds like a fine load. That said, I would not recommend that you shoot any load in a vintage gun, without checking the gun out. Ask your self some guestions. What load was the gun made for? What is the barrel wall thickness? Is the gun on face and bolt? Etc, etc. Do all the research that you can. Read the "Finding Out for Myself" series in DGJ. At the end of the day, it is you and you alone that must make the decision.

Phil