I don't see the logic of these shorter .45 loads. The gun adopted would have probably been the Colt New Service, which indeed was adopted as the Model of 1909, or the new S&W TL. The guns were easily capable of taking longer brass and the solution was to use the .45 Colt, but with a wider rim to facilitate extraction in DA revolvers. And that is what the Army did: they made the .45 Colt M-1909 ctg., used until enough M-1911 .45 autos were available. But they loaded it light, to 725 FPS, probably to limit recoil bothering the average soldier.

I don't shoot in CAS matches, but think they ought to use cartridges available in the era they profess to emulate. Doing more smacks too much of gamesmanship, not of reality-based gunfighting skills ca. 1880.