I just fought thru the same type issues. Cases would extract and ejector would kick them over to the right wall of the receiver and drop right back inside. Long story short, when I compared the ejector plunger to another rifle, the problematic one was not protruding as far out of the bolt face as the functioning one. I opened up the notch on the plunger that the retainer pin rides in with a file to let it protrude a bit further and Bingo problem solved. Maybe worth comparing to another bolt that is working properly??