Bill,
You certainly are amoung many folks who thought that Confederates normally carried Brass Frame Revolvers, including me over three decades ago.
In 1981 and after working my way up to Sergeant in my Confederate Marine Unit, I would sometimes "galvanize" or wear a Federal Uniform to be a Confederate Scout/Partisan/Spy at some "Tacticals." A "Tactical" was what we called a Civil War "War Game," and they were done by North VS South Reenactor units. Tacticals were for we reenactors and not the tourists. We did them at some events on Saturday when the Battle Reenactment for the Tourists were on Sunday. However, once or twice a year, we did a weekend Tactical for Reenactors only.
I was in charge of a small group of Confederate Scout/Spies for our unit for tacticals, when I happened to be in a Civil War shop and noticed they had a used Federal Cavalry Shell Jacket rather cheap. The idea occurred to me that if I wore a Federal Cavalry Jacket when doing Spy/Recon Work, I might not be recognized as easily as if I tried to emulate a Federal Infantryman, because the Federals recognized other Infantry Units that they served with. I purchased a Blue Kepi with it, but did not put any brass unit designations on it, again, so as to blend in easier. It felt creepy to wear that uniform, but it really worked. A few times I was able to walk openly between the Federal Unit camps at night or early in the morning, to listen for their plans for the next day or that day. Before that, we had to sneak up on the Federals and stay out of eyesight. I found out the Unit Designations of a couple of Federal Reenactor Calvary Units and planned on telling any Sentry who challenged me that I was in one of those units. I even carried a steel frame M1860 Colt to enhance the deception. I was only challenged one time and my "story" was accepted by the Federal Sentry on that one occasion.
That steel frame M1860 got some hard usage at those Tacticals and never skipped a beat or had a problem.
Then in 1982 some members of my and other units came to me and said they wanted to start a new Confederate Unit; as our old unit had decided wives, girlfriends and children were not welcome in camp so as to be more authentic without them. (I was one who spoke out and voted against it, but the vote went the other way.) They asked me to be their Commanding Officer in a Virginia Infantry Unit. I did not take the offer at first as I tried to change enough minds in our unit, but that ultimately failed, so I agreed. So besides an Officer's Uniform, I had to get a sword and originally was going to use the Colt 1860 revolver. The problem was we decided to do a Pre War local Militia Unit that was mustered into Confederate Service as a Volunteer Infantry Regiment. So that M1860 revolver was not HC for early War reenactments.
Have to admit at that time I was also under the impression that a Southron Officer most likely or probably carried a Brass/Bronze frame revolver, before I did more research. I really did not want to buy a brass frame revolver because from working the NSSA Nationals, I had already found out they were much more prone to problems than steel framed revolvers. While doing research, a rather new book on Confederate Long Arms, Pistols and other arms had recently come out and it was a pictorial study with quantities of the guns actually manufactured by the Confederate Makers - so I bought a copy of that book. That's when I found out that some Iron Framed Colt Copies had been made in the South during the war.
At the next NSSA National Shoot, I spoke with some members of the NSSA Ordnance Committee about whether a steel frame revolver would be HC for my Confederate impression. These guys were absolutely scary how much they knew about the original guns and not only makers, markings and production numbers, but also down to the tiniest mechanical details. So when I asked if an early war Confederate Officer might have had an Iron Frame Colt rather than a Brass Frame, I was informed it would have to be a real Colt for that early of an impression. He explained the Brass framed Confederate Revolvers came out later and in such small numbers, that it was more HC/PC to use an Iron/Steel Frame than a Brass Frame. He brought further documentation by our booth that weekend to prove it. Needless to say I was relieved, because I wanted to buy a steel frame repro. OK!! So I picked out a really nice Navy Arms repro Colt Navy and purchased it that weekend.
Then I "only" had to find a proper sword and that turned out much more difficult because no one was making copies of M1850 Infantry Officer Swords in those days. I already had an original M1850 that my Confederate ancestor had been presented, after my ancestor blew the original owner out of the saddle. However, I was NOT going to use the Family Sword for other than perhaps some special Living Histories. So at first I used an original War of 1812 sword I already owned, until I was able to reassemble a Model 1850 from original parts and sewed the leather scabbard myself.
Gus