Hey North Sylva,
here is a video that was posted in the rimfire section. This video shows an FTE followed by an abnormal detonation of the next round (as the bolt is still opened). Sending the FTE empty shell flying sideways at dangerously high speed.
[YOUTUBE]4IlxUsAZueg[/YOUTUBE]
Of course, this is something the manufacturer should be addressing, not you. But do you know anything about this issue? is it being looked into??