I'm going on the standard we used to use in the knife collecting world.
We classified a Ka-Bar knife as a reproduction, since it was made by the original company that made them during the war. In other words, it was RE-produced.
We classified a Japanese made Ka-Bar TYPE knife as a "replica" since obviously the Japanese didn't make them during the war. It replicated an original, but wasn't.
The same standard is sometimes used by advanced gun collectors.
A 1980's Colt 3rd Model Dragoon was a reproduction since it was produced by Colt and used the same serial number sequence.
An Italian Uberti 3rd Model Dragoon is a replica, since it isn't Colt made. (I know, the 1980's Colt's were made in Italy, and finished by Colt, but you get the point).
In some endeavors, you use definitions that vary somewhat from the dictionary.
This "standard" was used to distinguish copies from the "real thing".
In the "real world" replica and reproduction are used interchangeably, and I don't dispute you.