Hey PJ--sorry to hear of the tribulations you're having with your OT's. To have problems with one would be bad enough, but both-not good. Several have posted that you just send them to a smith or maybe do the tuneup your self to get them in working order, but I say get ahold of your dealer and Cimarron and demand two that are trouble free. For what you pay for them, you shouldn't have the problems you're having. I know many say all (or most) Uberti percussion and bored through cylinder type revolvers (OT/conversion) need to have the arbor adjusted, but to have the problems you're having is irresponsible.
When I bought/received my OT (44 Spec) in the fall of 08 I was disappointed with it. The rear sight had half of the right side missing due to a poor casting, the metal to metal fit of the frame and trigger guard was so out of wack a blind mule could have seen it, and the case hardening on the frame was non-existent of any color. I thought "pee on it"--Mike Harvey in Cimarron's catolog was proudly voicing how the Uberti products made for Cimarron received extra care, fit, and quality control that made them better than 'run of the mill Uberti's'. An article in either Guns Magazine or Guns of the Old West Magazine had a article where they interviewed Harvey and he explained the care Cimarron products had and he expected at the Uberti factory and how proud of his products he was and guaranteed them to his customers. After I had the OT for a day or two, I called Cimarron and voiced my displeasure with the OT, explaining the problems I that had with it and that I wasnot very impressed with it and wanted to return it for a replacement. I called the owner of the GS (FFL) dealer who ordered it for me and advised him I was bringing it back for return. I wrote a letter marking it for "Mike Harveys Eyes and Reading" that included my low opinion of his "extra care, tuning, and quality control" that he always stated his products to have. A short time later I received a call from Cimarron stating they just wanted to fix the rear sight, frame/trigger guard fit, and do something about the lack of any color to the frame. I said no--either replace it with a OT that meets Cimarron's voiced and written statements or give a full and total refund which would include a 'no more buying' of their products. I don't know if the letter ever was read by Mike Harvey or not, it did get the attention of someone at Cimarron who was part of the "Who's Who" because shortly after I received a new replacement that must have gone through "Quality Control's 4th level. Not one blemish-was a sight to behold. Other than doing a quickie arbor job (the use of several thinknesses of brass washers-didn't like the split washer fix) and had a bolt that was coming up on the cylinder to soon (replaced the bolt with one with longer legs-Cimarron furnished), I am pleased with my Open Top. Bought a Richards II (44 Spec) about a year later from Cimarron and it has been a dream piece. Arbor fit A+, fit and finish A+, and all action parts/fucntion A+. I did buy a Uberti Richards/Mason (38 Spec) from Taylor several years ago. Had to brass washer the arbor and tune the bolt a bit, but no other problems.
As I said, I'd contact Cimarron and tell them of the problems and demand proper replacements or if it is minor fix-let them do it. No sense laying out plus/minus $1000.00 for two firearms and have the problems you have and paying for it yourself. If enough buyers contact a seller, they'll get the message. "Nip it in the bud"- (Barney Fife)! I don't know if anyone at Cimarron reads posts on the forum (I know at least one member has connections there), maybe that'll tell Mike Harvey and his staff something. Just my opinion and how I'd handle it. CC