Kuduae, Thank you for answering my questions on the date and origins of this action. I am assuming that arsenal made test actions were probably not that plentiful so, rifles like this one would be less common than sporters made on Mauser commercial actions? You mentioned that the original marking 2.67g GBP was a load that was not avaliable commercially so the rifle was restamped 2.45g GBP. I've seen several Oberndorf Mauser sporters with the 2.67g GBP intact. Do you think they were sold before the 2.45g load was avaliable or were they not required to restamp them and just sold them as is?
I would love to find a scope for this rifle someday but I've never seen claw bases quite like these.

It is quite accurate with the sights. The front sight also has a large ivory flip up bead behind the standing front sight,I guess for low light.
Thanks again for your help, I do appreciate it very much.