Changed my post.

Blaser and Sauer switch barrels ... easy to add a different barrel.

Mauser M03 and presumably the M12 (?) have all sorts of cartridge chambering range choices as well.

My GUESS is the standard Mauser 98 action relaunch was driven by Rigby and Mauser itself is taking advantage of the actions it is making. Why not?

Isn't the "Mauser" group, not sure of the structure but

Mauser
Rigby
Sako
Tikka
Beretta
Blaser
and others?

all in the same group of companies?