Yes I realize that, but using a mike, and talking a picture proved to be difficult. The throat erosion is between 1-2. I've got the no-go, go and field gauge and the bolt had passed all three. The I.d. of the muzzle is .302 for argument sake.
The op rod is the only part that looks out of sorts, as far as the color. The drawing number is also out of date, march 1943. I will take detailed pics of the site tonight. Could I just replace the knob worth a lock bar or would I have to replace the entire rear aperture? I tote it down last night to look at the color of the trigger assembly, fowler and ect, and they all have the same dull grey appearance.