I hope my post didn't give the impression that I would approve of such loading practices. On the contrary, I agree with everything you said, and would go even further by saying I wouldn't even use the hot loads listed for the 1892 in and 1892 either. The '92 action is certainly strong enough, but the case is not. I've not loaded for a '92 myself, but have read that the hotter loads in 44-40, fired in the '92 action, have resulted in case separations in as little as two loadings.
My point is that there may be people out there that are less cautious then they should be that will assume that, since the apparently same rifle is available in 44 mag, they can jack up their 44-40 loads. In my opinion, this would be a dangerous mistake to make. For myself, if I want a 44 magnum, I'll buy a 44 magnum. My 44-40 does exactly what it's supposed to with reasonable loads.