Matt, could you list the serial number, or at least the first few digits?

A 9-43 barrel would indicate a serial number in the 3.9M to 4.2M range. The RA is seen on later Remington stocks and stands for "Remnington", not Rock Island. The markings you mention, especially the stched ones on the bolt, sound like the rifle is one of the Greek returns, all right.

FJA is Col. Frank J. Atwood, who commanded the Rochester Ordnance Distict, whick contained Remington and other arms manufacturers. The small markings ahead of the trigger guard are subinspection markings, seen on Remington M190s and M1903A3s (as well as SC M1903A3s).