The 1884 was worn from 1884 clear to 1908 or so, was seen in the apache campaigns of the southwest, as well as Cuba, and the Phillipines. I've got Edison newsreels of troops in Tampa and Daquerie, wearing 1884s. Most of the regulars, as well as the 1st USV (Rough Riders) were wearing them at the San Juan heights. The first 1898 Kahki's did not reach the troops until the 2nd week of July. So you could use most any .45-70 trapdoor, and any of the Krags, with the 1884.
In his picture up there, Cowtown scout is wearing the Officer modified version of the 1884. To the left here, I have on the 1898 Kahki.