My aproach is different.
Here the Oberndorf action for ,318 . Small radius cut in the front ring. Magazine box 88 mm long
(Standard is 84 mm).
Made 1924 Large ring but small threaded.
All the furniture Type A.
The same action used for 30-06.
Will it be a .318 again. No will become 30-06.
The same old history but a better future.
http://up.picr.de/27497359wr.jpg