FWIW:
I am a 1911 .45 ACP guy and have owned several, all 5" Government Models. Still have one, but it is not a Colt.
About 1988 I bought a used Colt Combat Commander .38 Super matte/electroless nickel finish, with one factory mag for about $300 on a whim. It ran flawlessly with 130 grain FMJ, and cosmetically it was just about perfect. I liked the feel of it in the hand, as it had the flat mainspring housing, not an A1 arched type.
Compared to the .45's, I could not hit the proverbial broad side of a barn with it. After studying the cartridge, I found out it had a rebated rim, unlike the 9mm, and Colt did not headspace it on the case mouth. So I splurged and bought a spendy Bar-Sto barrel that supposedly headspaced on the case mouth. I had high hopes.
No joy. I gave up on it, sold it with both barrels at a loss, and stuck to the .45.
I imagine others have had much better luck than I had. Kudos to you folks!
Jim