Yes, the Henry, the 1866 & the 1873 basically have the same design.
You said: Not a real concern for me as I only reload black powder and shoot cowboy loads in smokless. ??
Your comment & this thread rang a bell in my mind. I started to dig through my back copies of Garbes Black Powder Cartridge News. In the Fall 1997 issue, #19, Red Meineckes Ruminations on Cowboy Shooting column discusses a blow-up of a Uberti .44-40 73 Winchester. The determined cause was that the rifle fired before the lever & bolt had locked in battery--there is no firing pin retractor, the tip of the pin protruded, & fired the cartridge as it was being chambered. This was conclusion of the gunsmith who investigated the incident & examined & tested the parts.
According to the author, the investigating gunsmith regularly did cause & effect consultations about firearms accidents & had @ that time investigated 200 + firearms accidents & provided dispositions. Meinecke further stated that such accidents were not of unheard of in the past & that he knew of several gunsmiths who were familiar w/ the frozen firing pin phenomenon.
Meinecke also related a similar incident about a Henry, which had fired when the bolt was about three-quarters in battery. In that case, the Shooter was not injured & the rifle suffered no ill-effects.
Reading of these two incidents are what caused me to retire & later sell my Henry. Not only because the toggle link design is not the strongest, but because: (a) I did occasionally shoot some rather stout loads in a Ruger .44-40 Vaquero & didnt want to inadvertently mix the ammunition; & (b) I realized that I needed to keep the firing pin, bolt face etc., scrupulously clean so as the pin would function normally--esp. when I shot BP.
As for the problems w/ the new Henry, I did not know the Shooter. A group of us were talking about rifles & he showed off his new Henry. From what I recall, he was going to polish the barrel by firing about 50 jacketed rounds to smooth it out before going to lead. The 1st few shots were OK , then the after firing one more ejection became difficult, & it locked up after firing the next round. I dont know if he was shooting the .427 Rem jacketed bullet or the larger .429 .44 Spec/magnum bullet or the powder load. But IIRC, the rounds were those he loaded for his .44-40 Ruger. I never heard or could find out what damage--if any-- was done to the rifle.
I do know of a know deceased Shooter who lost a .44-40 73 Win. to a blow up. @ the time, we all thought that it was operator reloading error as he was an elderly Shooter & Reloader. Now I wonder if the frozen pin syndrome claimed another firearm.
Just something to be conscious of
.