The Santa Barbara mauser actions have a mixed reputation. There have been claims/issues with them being "soft"; improperly hardened receiver metal. The claim relating to bolt set-back issues, I'd not use one for any purpose. Potentially 'unsafe at any speed'; my opinion. The Winchester pre '64 receiver & bolt body are fabricated of Chromium Molybdenum alloy steel. Not to comment on dimensional considerations, but to date a highly successful super-strength steel, if something in the manner of 'over kill'. Perhaps in the application of "target arm", a push-feed action system might better suit such needs. Superior breech sealing in PF as opposed to ultimately reliable feeding in CRF.
Good luck with your project and...
Just my take.
John
