8.2x57 Mauser Pt. II

I read the last post and had to do some figuring as to what may/may not have worked.
In any case, like most of you I came up with very little on the internet.
However, I did note that my 8x56R bullets (208 gr.) fit the dimensions described quite well. The bore is .323" and the groove diameter is .330". Which would translate roughly to 8.2mm (land dia. as most bores are called). .338" bores are 8.58mm
The barrel diameters were quite common, being built in Romania, Bulgaria and Austria. But...they were called 8mm's not 8.2mm's.

So, my thinking on this is what if someone got barrels and rechambered them post WWI, and to omit confusion called them 8.2 and used the standard 8x57 chamber reamer to cut them?
The idea clearly not taking off as so little is known about this.

Just my hunch.

In the case of jaegermeister's rifle, that he just picked up, he might well have gotten a later .338" bore? Possibly re-bored, but not marked?