Update:
I received the revolver back from Cimarron's gunsmith a few days ago -- so about 5-6 weeks after I originally shipped it out.
The gunsmith's note in the box indicated that he replaced the bolt and re-timed the revolver, and I do notice that the lock up is certainly better than it had been. However, the metal on the cylinder notches is so peened (apparently owing to damage done from the previous, faulty bolt), that on some chambers, the cylinder can still be rocked back and forth very easily, bringing the gun out of battery.
In addition to this, the finish on the cylinder has new marring on it that was not present at the time I shipped it back. I am not overly concerned with this, as it's purely cosmetic, but it is frustrating to see finish damage occur during repair. The marks are such that it appear vertically, as though made by a vice or something. Not sure, and I'm not really too concerned about it. I suppose it's possible that some of it existed prior, but as I look through pictures I took prior to shipping, I can't find it. I had the gun for only a couple days before shipping it back, and during that time didn't holster it, etc.
As it stands, I am not confident that the gun is in a safe condition to shoot, as the cylinder can too easily be taken out of battery due to insufficient lock up. I understand that a little play in a cylinder is not an issue, but this is more than just a little wobble -- the bolt is able to actually jump out of the cylinder notch on certain chambers.
I reached out to Bobby to report my findings. He called me a couple days later and sent me instructions and a new RMA form to return it back to the gunsmith again. I noted the issue of finish damage, but more importantly, I drew attention to how mangled the cylinder notches are, due to the peening effect of the presumably faulty bolt. I guess I would have assumed the gunsmith would have elected to just replace the cylinder entirely.
So now I have it packaged up again and ready to go out tomorrow.
We'll see how it turns out. I'm a little nervous at this point that the gunsmith will just be offended by my critique of his work, and this process will only get more painful. But who knows. I'm withholding judgment until the outcome.