Ruger MKII VT, it feels like it is cocking, in that the bolt gets stiff as you begin to close it, then you can feel it get much easier as the bolt is closing. The trigger does not reset. I could post pictures but externally I dont see anything that looks out of place.
Ok I see how it works, when you close the bolt, the cam moves back and cocks the trigger. The cam is moving back but the trigger is not cocking. I don't see any metal that looks like it is broken, it feels like the trigger never reset.