Ok, I have a professional sporterize Win 30 cal 1917 rife with a 5 grove rifled barrel. I was told by 2 differant G-smiths that the barrel is origeinal. There is a felloow shooter at the range I shoot at that has an unmolested 30 cal 1917. He said his is a 2 grove rifling & that it is the origeanal mfg barrel & that all 30 cal 1917`s had 2 grove rifling. Is this true? I always thought the 2 grove barrels were replaement barrels around WW2 era. Thanks in advance----O T D