Need to be enlightened on how Savage assigned serial numbers on their rifles.
Curious, why do you need to know?
Did they do a batch of say 99 EG's in 300 Savage in sequential numbers then do a batch of 99 R's in 300 Savage in sequential numbers or were different calibers mixed in.
I don't anyone except someone inside Savage would know for sure.
It appears Savage did give serial numbers some consideration at a high level with s.n. cutoffs, 500,000, 800,000, etc.
Beyond that, serializing batches of receivers would likely be sequential, but what caliber/direction the rec'rs went would be driven by forecast/orders in a manufacturing environment. Could be anything that made money that day.
JMO