FWIW - Before dabbling with Krags, I never expected 'fired brass' from different rifles of the same caliber to fit, almost interchangeably, without being sized.

Tolerances, wear and dimensional differences, made Full-Length Re-sizing almost a given.

It has only been with Krags that I have experienced the pleasant experience of having 'fired cases' fit in a number of rifles and carbines, without resizing.

It has not happened with all my Krags, but, does with most of them.

I have a model 1896 chamber that allows a bit more expansion in the diameter of the case body. That rifle is my sole exception, now.

(When our Krags were made, the U.S. Military was not reloading fired brass. The early Mercuric Priming had made that unwise!
Cartridges were a one shot deal and rifles just had to accept the production from Frankford Arsenal and war time contractors.

Eventually, Frankford Arsenal developed some reloading sets. It is hard to tell to what extent these were utilized. It certainly would have risked producing ammo of substandard quality.
Reloading seems to have been mainly a civilian shooter thing.
There were those reduced 'gallery practice' reloading sets, which make sense).