My 03A4, s/n 4998457, is one of the final ones out of the barn in spring 1944. It has a RA 1-44 barrel measuring 302 on the GI throat erosion gauge and 30075 at the muzzle, which I believe to be an original installation. It also has a scant style stock, which again appears to be the original. It is an accurate shooter.
I believe that Sedgley may have produced the lastest dated replacement barrels. I have a 1922 vintage M1903 which is fitted with a 1-45 dated Sedgley showing 303 on the GI throat gauge and 3015 at the muzzle. It is a good shooter.