I would also like to learn of the results of someone who shoots the 45 Colt at 200 yards in the 73'.
Using a standard 250gr lead bullet along with a comparison between pistol powders and rifle powders.
Here are my results using the 44-40 and a 73', but also with a scope.
265 to 300 yards (I measured 265 yards, but the range claims 300 yards)
The comparison is between Winchester's 1866 Switzerland Trials (hits in white), John Kort's replicated 44 Henry ballistics using a reduced 44-40 loads (hits in blue), and my custom loads in the 44-40 for 1,350fps. (actual holes).
Would really be nice to add the 45 Colt cartridge rifle performance at the same ranges as if it had been available back then in the 73'