Re: H&R 922 cylinder does not lock
Run from it. Those guns (and all H&R's and IJ's) are OK as long as they work, but they tend to have problems, and as soon as trouble crops up, someone decides that the gun is not worth taking to a gunsmith and decides to do a bit of amateur "surgery" that almost always makes things worse. If you decide to collect those guns, fine, there are still lots of near new ones around for a collection. But as using guns, I advise avoiding them. And definitely avoid the ones that show signs of trouble or of having been worked on.
(OK, I know you have one that your seven times great grandfather bought from George Washington, and it has always worked perfectly, but it is the exception.)