Sorry, meant to type another 1 there, (fixed it) 1.11" dimension at the top of the threads - Detailed as 1.11 to 1.115 and "1.115 Max under locknut" on the 1&1/8 barrel shank.
Looking at the remaining wall thickness, interesting to note that a standard Savage, chambered in a weatherby or Lapua size case will still have more barrel material around the chamber than a win 70 chambered in a standard magnum sized case.

I'll read that thread, thanks