Lazerwolf-- The rifle is definite a parts guns made up of Pattern 1914 parts with a M1917 barrel, bolt and stock. At least from what I can tell. I would tell to just shoot the rifle if the headspacing is OK. The receiver is a very early Eddystone P14 one. I do not know the reason for the conversion. But if the rifle had all of the original P14 parts, it would be of interest to some P14 collectors. Someone probably purchased one of the cheap imports from several years ago and converted the rifle to .30-06. One of the few conversions from .303 to .30-06 Springfield that worked. I have found that most of the M1917 projects that I purchased required major fitting by a gunsmith. I am glad your's is not a Winchester P14, they seem to be the worst to fit M1917 parts to.