Range report, pics self-explanatory.  I did some touch-up using Birchwood Casey Aluminum black on 000 steel wool.  The color took nicely and blends in well with the original patina.  Purists may whine, but I think once it has weathered a bit, it will look "right."  Sights on the money.  These 25-yard sandbagged groups show promise.  #42798 bullets which came with the gun, sized .427 with old Ideal black lube and 6.5 grains of 452AA shot well, as did my new Accurate 43-206H cast 1 to 30 tin-lead, loaded as-cast and unsized, tumbled in LLA. Rounds were profiled in the Redding Profile Crimp which sizes bullets to .429" by compression inside the case, applying a moderate roll crimp similar to that on factory rounds.

Think I'll leave both the gun and the load alone.