MCB sorry tons of revolvers were issued and used by the allies during WWII. Colt tested and made a number of .357 Mags. in the 1917 New Service Colt. These guns were tested by Elmer Kieth and others at the Utah testing center. The .357 did not meet military standards. The .45 ACP and Moon clips stayed thru WWII.
There are reports that some 1917 Colt .357 Mags were issued to some special service units. I have seen a few of these very rare Colts. They also chambered some of the 1917 Colts in .30 Carbine. This project was tabeled in the early 1940s.
The Britts were issueing the S&W 1917 in the powerful .45 Enfield a short version of the U.S. .45 Colt thru and into the 1950s.