Oh, and a lot of people don't remember that 1873 was also the year that the .45-70 was officially adopted.
I am not so well versed in long arms, handguns being my study of choice. But I recall from some now forgotten source that the .50-70 was the rifle cartirdge at the time, but that the .45-70 replaced it because the 500 gr. .45 caliber bullet was ballistically superior, especially at long range.
I remember my father telling me of seeing soldiers marching through Nashville heading off for the Spanish-American War. These would have been National Guard troops. They were armed with the .45-70 Springfield rifle as they marched.