Huntress you mentioned your trigger was loose, I can only assume that either it somehow came loose while hunting or you didn't tighten it back up the last time you cleaned it. Either way that's a human error and in theory a basic design flaw of the "pull bolt" Knights. With the bolt safety screwed into the fire position the only other safety is the safety lever itself. With your trigger assembly loose the sear was the only thing holding the bolt (or hammer if you will) back. On the Knights if they move over a fraction of an inch the bolt will no longer be held back by the sear (or top of the trigger) and the spring will naturally carry it forward onto the primer. If indeed that happened your trigger wasn't pulled, the assembly moved a fraction of an inch and the bolt was released. I also feared that happening on my old Wolverine but in 15 years it never let me down. I will be honest, ANYTIME I was stalking or walking and looking I had the bolt safety unscrewed. But I felt assured the trigger assembly was snug.

Either you need to double check that assembly or if the screw is prone to come loose I would GET RID OF IT!!!

Glad your safe and I doubt you'll EVER allow that problem to occur again!
RA