The Win M-70 is closer copy of the Springfield than a Mauser. The are several cost cutting changes. In the case of a catastrophic case failure the M-70 will send gasses into the shooters face, the Mauser will not. The M-70 action does not have a full set of barrel threads, the Mauser does have a full set of barrel threads. The Mauser bolt acts as a safety lug the M-70s does not. Just to name a few advantages of the Mauser action.
