I’m not sure where they started the .45 Long Colt nonsense since I have a Sear’s and Roebucks catalogue from 1900 that lists it as .45 Colt.
Save yourself some typing.
.45 Colt has been called LC for at least a hundred and 30 years. The reason was to distinguish it from the short Colt.
At one time the U.S. Army issued revolvers chambered for both cartridges and at the same time.
I hope you don’t go around calling the .45 Auto, .45ACP. I do but I am not a stickler for exact wording.