I have an H&R model 622 that I bought new in the 60's. I used it for many years while small game hunting here in Pa to finish off wounded critters. I haven't had it out for a very long time and when I looked at it yesterday I was surprised to feel the barrel move. The gun has an "AB42000" serial number range. Searched the site and found no reference to this problem and would like some advice on correcting it. I am on the wrong side of 65 and have been giving away guns to sons and nephews. I know there is not much value in this revolver but I always enjoyed it and would like to pass it on. I can't find any drawings on this model and would like to know if the barrel is threaded or pressed and pinned and how others have fixed theirs. thanks