Many Thanks for saving me the time to find the Dr Findlow article. But are you now trying to make me jealous? My Henry is but a 450 BPE 3 1/4 with hammers, in really fine shape but certainly not the princely 500/450 3 1/4 magnum(!)And my gun is stamped with a "15" on the left-side butt, a marking from the Maharaja's arsenal. No doubt it flew back to England when they banned all.45 caliber guns from Africa and India. And you had a Henry NOT from the arsenal but one made especially for the Maharaj Rana of Dholpur. With the oak and leather case with all the attendant goodies. My God, Mr Davidson, how many sleepless nights did THAT sale cause? What a package of beauty that must have been, even WITHOUT the - "oh,by the way, it was owned by..." -history attached to it! But I am familiar with the sad things one must do when money must be gotten "tout suite".
Thank you also for that mention of the Henry double rifles being cased with a mould numbered to the rifle. I suppose I could search for the original mold to my rifle while you search for the royal gun you once owned. I'd hate to see the odds on either endeavor!
Yes, if I do experiment with a variety of bullets they most definitely will be lead and not jacketed. And yes, I think I will still go through the whole ordeal of getting the correct measurements of my barrels. That way I could really get my money's worth on having a new custom mould made.