My experience with hammer tackers is that they will sometimes jam when you get down to the last few staples, possibly because the staples go out of alignment when there are only a few of them left. The solution is to open the hammer tacker up, and pry out the jammed staples. If the tang is not bent, you can load it back up and continue along. If the tang is bent, you need to replace it, good luck finding the part, it might cost more to repair than to replace. The good news is that I have never bent the tang, I think it would take a serious combination of power and bent staples to do it.