I had a chance to shoot one of these earlier this week up at our cabin. My cousin brought one up in .45-70. What a sweetheart of a rifle. I shot 2 rounds out of it offhand at about 50 yds with open sights. Although both shots were about 6" low, they were only 1/2" apart. The sights, although appearing to be crude, were very easy to pick up and align. The rifle balanced well in the hands and seemed lighter than my Marlin Guide Gun.
Now, I am aware that this rifle cannot take high pressure loads. I think that the reason is the wall thickness of the barrels in this chambering. The 30-06 chambering can handle the higher pressures because the barrel walls are thicker. In any event, I am thinking seriously of getting one of these. I think it would be a blast loading this old cartridge with a black powder substitute and make some smoke with it.