Yes Craig. The industrial standard for non-heat treated 4140 is 95,000 - 100,000 psi.
I'm only guessing but assume Winchester got pretty close to what they requested; and all the literature/ads state "Chrome Molybdenum", not 4140.

Interesting reading. "Blast Furnace and Steel Plant", July 1921
https://books.google.com/books?id=1dwfAQAAMAAJ&pg=PA426&lpg