Are you sure the action is a standard m98 length? Is the distance between receiver screws 7.835" or 7..62"? The intermediate actions were used for 30-06 length cartridges by milling the front of the action and extending the magazines. I am unaware of any regular length actions.
BTW, I remember also seeing a Hubertus rifle built on the same action. IIRC it may have been sold by Franconia. i had one of the Herter's XK3 rifles built on this action in 6mm Rem.