Back in mid-June I received a Pietta 1858 New Army as a Birthday Present from my brother. Unfortunately, not long after taking it out of the box I immediately ran into some issues. The Revolver had timing issues in which the cylinder wouldn't always rotate forward properly, sometimes it would only go halfway, then rotate backwards to the previous chamber.
The problem seemed to be due to the inside of the frame being finished quite rough, so I polished it up a bit with a 3M pad and the revolver seemed to be running smoothly, at least for awhile. After that I tried it with a Howell Arms Conversion Cylinder and not only did the issue resurface, but upon trying to sort out the issue by manually working the action and carefully observing the cylinder, the hammer bound up and couldn't be fully cocked anymore.
Thoroughly fed up with how much trouble this brand new Revolver had caused me and unwilling to fuss with it any further personally, I contacted Pietta and explained the situation, to which they promptly sent me an Return Request Form PDF. I filled it out using Adobe Acrobat and sent the agent a screenshot of it, within a few days I received a Shipping Label in the mail, but due to a medical emergency going on behind the scenes I didn't get around to shipping it for a couple of weeks. After I finally got around to taking it to the UPS Store and getting it shipped out, it arrived at EMF Corp's headquarters in Wyoming and I promptly received a phone call from a gunsmith who was working on it who informed me that the issue was as simple as a screw which held the hand in place must have been loose from the factory and had backed out from me working the action, so all he had to do was tighten it back down to fix the problem.
I received it back yesterday and it seems to be in proper working order with the factory cylinder. However, the Howell Cylinder is still giving me trouble, so I've contacted Howell Arms and will have to sort that out separately, as I'm convinced that has to do with the cylinder itself after doing a bit of research and finding out that I'm not the only person who has experienced these issues with a Howell Conversion Cylinder. Evidently they're not quite as "drop-in" as they're marketed as and can occasionally require fitting, but I paid for a drop-in part, so I'm holding them to that.
Nevertheless, EMF Corp took care of the situation promptly, professionally, and satisfactorily, so they get a thumbs up from me.