OP can answer that question about his revolver.
I've dealt with Kirst in the past. They ship very quickly. Their products are beautifully machined.
Given the freeze, if you have an Uberti or Pietta percussion revolver, setting it up to use cartridges is almost as good as buying a new gun...
Keep in mind that in order to load via the loading gate in the breech ring, it is necessary to alter the frame. This is not unsightly, is not difficult, and does not preclude the use of the revolver in cap and ball configuration.
Something else to consider... If your revolver is a .36 and you want to use .38 cartridges, the bore is the wrong size. It will have a groove diameter of about .375. There are options. Load hollow based wadcutter bullets.; the hollow base will expand. Load with heeled bullets. Install a barrel liner with a bore suitable for .358" bullets. For .45 conversions, choices are .45ACP, .45 Schofield or .45Colt.
The Colt type revolvers have two basic frame patterns. .44 revolvers used a rebated cylinder. The front end of the cylinder is larger in diameter to allow for the larger caliber without going to a full length larger diameter cylinder, like the Dragoons have. A frame cut for a rebated cylinder can be set up in either .45 or .38 cartridge. If the frame is not cut for a rebated cylinder, only .38 is possible. .44 and .36 barrels fit the same frame. The .36 cylinder is shorter, the breech end of the barrel extends rearward to suit. .44 cylinder is longer, and the breech end of the barrel does not extend rearward as far. To maximize cylinder wall thickness and avoid problems with the locking notches in the cylinder, .45 cylinders are only 5 shot.
The Kirst cylinders have a little divot drilled in the web between the chambers. When the hammer is lowered, the firing will engage this divot. This is intended to keep the cylinder from revolving so that a primer does not end up with the firing pin resting on it. Same idea as the pins in a Colt percussion cylinder engaging the notch in the hammer face. Like all early single actions, the safest way to carry one loaded is with the hammer down on an empty chamber.
The same breech ring is used with all cylinders. If you want .45Colt and .45ACP, you can get one ring and cylinder and add a second cylinder later. Or, if you start with a .45ACP, you can get a .38 cylinder and a new barrel and use the original breech ring. Etc.
My experience is with Pietta. Parts interchangeability is quite remarkable. Different cylinders, barrels fit a frame.
The Kirst website explains the options.
