Beats me. I have not had anybody to tell or show me what "Ballard style rifling" actually is.
Marlin just uses it as a trademark for six groove rifling to differentiate it from Microgroove, since they were the last owners of Ballard Rifle Co.
There was a modern Ballard not really connected to 19th century Ballard or Marlin, but I don't know if they would have put a barrel on your Mauser.