GREYDOG~ Well I have never had any trouble with mine. However--- They can be trouble if you don't keep the ammo, AND the holes DRY-- I REPEAT--- DRY--- I have both cylinders with mine but never use the .22LR-- There was some brass made available some years back, and I added a case to my stash. Whether or not there is still any available-- I do not know. Any ammo would more than likely be collectible, so you will have to load your own. I am not up on the latest here so I guess someone MIGHT?? be making it--- I doubt it though. Another thing. Many of these were drilled for scope mounts. Check under the strap across the cylinder for this. Such holes can be plugged-- or not. Value is somewhat reduced as a collector item if so drilled.
In loading for this gun, you are better downloading a bit as it will make that pricy brass last longer. By now, I expect bullets may be getting hard to come by as well. JMHO

OH YES-- SOME OF THE EARLY GUNS- the ejecctor rods had LEFT hand threads FYI