I got an 1895G, 45-70, with ported bbl not long after they came out. Installed XS ghost ring sights, and later a slip-on Limbsaver pad.
3 shot groups at 50 yards and 350gr soft point were less than 1/2". (basically 1 hole)
Full power 405gr cast averaged 2.7", while plinking load with Trail Boss ran 2.3"