I built a 7 saum on a Browning A Bolt and it was quite the effort.
The mag needed to be extended to accommodate the 168 VLD and
162 SST loaded out to the start of the rifling. It cost me $100 per mag to have them extended .020...I ordered 2 of them.
Just a note on this topic, the Browning and Remmy Short actions and mags are both shorter than a M70 SA.