Why doesnt my M1917 Bayo fit on my M1917??

[72 usmc]

Total rifle length, so your measurement is 45 7/8 ", mine is 46 3/8 inch. You may have to remeasure so we are measuring from the same spots & manner. See photo for consistency in measuring method.
Total stock length, so your measurement is 42 3/8 ", mine is 42 3/4 inch. Likewise, be sure we measure from the same points. see photo.

So if you remeasure in the same manner from the same points what did you get?