I had two 8" barreled Remington Pietta's that I got from Dixie Gun Works, in 1988. During the early 90's, I bought several spare cylinders from Dixie, and all fitted perfectly. During, "The Divorce," these two revolvers were illegally disposed of by my Ex-Wife. The only spare cylinders I have experience with since that time have been the 13 that I have bought from Cabela's, during the period, 2012 to 2014. All have worked perfectly in my three Sheriff's Models, and in the 1866 Carbine that I sold to Richard a few weeks ago. The carbine (Of course.) was made by Uberti, but the previous owner had had a gunsmith
slightly enlarge the hole in the frame, to enable the owner to use Pietta Cylinders in it.(He too was a Pietta Revolver Owner!!!)
All the (16) cylinders I possess, are all Pietta cyinders! I personally have never experienced any problems with the fitting of new cylinders to either the Older 8" barreled revolvers.(Bought from Dixie Un Works.) or the newer cylinders bought from Cabela's, to fit the newer Sheriff's Models, also from Cabela's! Mycurrent revolvers were manufactured: Betsina and Clementina, 2011 (CH) and Sophia, 2012 (CI0) All these cylinders, including the one now fitted to Richard's Carbine, worked very satisfactorarily in all three Sheriff's Models, AND the carbine when it was mine!