Here is my FA breakage story (so far). Just last week, I picked up a .22 LR 1997 with a 5.5" octagon barrel and the micarta grips. This has been my dream revolver for quite some time as I am a dedicated rimfire fan. On the other hand, it is not my first FA, and I currently have an 83 in .454 and a 97 in .357. Those two work fine, but the new one is out of time. As this one is used, I suspect it will cost me a bit to fix. I am planning on contacting FA on Tuesday morning, so that I can get it fixed.
The problem is simple: sometimes the bolt does not drop into the frame when the hammer is placed at half-cock. Or, more precisely, the bolt drops into the frame as the hammer approaches the half-cock position, only to return to the locked position when the hammer reaches the half-cock position. I suspect I have a broken or weak spring, but the gun is going to FA to be fixed. Do I blame FA? Heck, no. I cannot be sure that the previous owner did not abuse it although I see no signs of abuse.