I have a 50 eg and the rotor is cast steel. We’re they common and why did they go to case hardened steel?
The rotor is "sintered" stainless steel . Folks have to remember stainless has been around since the early 1900's (Krupp Iron Works) .
I would say not very encountered in 99 rotors.
I have an EG made in 1948 with the sintered steel rotor . I have a photo of the sintered rotor out of the rifle and can clearly see the mold lines . This is a process that was researched and perfected in the US during WW2 .
I have two 99's with the color case hardened rotors (which are not stainless) . One is a EG in the 800,000 range .
The brass and cased rotors are my favorite .
