I am putting the 2 photos in a separate reply to make it easier to find for other searching for AD. The photos show wear on the point of the cam following surface, more extreme wear could cause the cocking  piece not to pull back far enough to catch the sear. Not my issue but could be helpful to others. Photos are now upgraded.

These photos are not from the problem sporter, but are from a junk firing pin used for experiments. The worn areas have a line drawn around the wear. The roughness in this area would be bad for a good bolt as well a possibly getting worse. For others diagnosing an AD event this will be something to check. Worse wear in this are could cause the sear surface on the cocking piece to not engage the sear.

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