Keith, I am not easily offended.....you're not even close. And yes, I already knew all this, including the CCI primers. I am not reloading for this rifle, but I have in the past been an avid reloader so I do have knowledge of what you speak.
I already have had the spook of someone other than myself shooting this rifle. It was at a private range, and the shooter experienced (else he would not have shot my rifle), so there were no problems other than the unexpected runaway. It is not consistent, making it a little harder to diagnose.
I have stripped and cleaned this gun thoroughly, and can confirm that everything is clean. I immediately thought stuck firing pin myself, but such was not the case. The FCG is untouched except for cleaning. The rifle is not old, and the sear looks good. I also suspected that.
I have simply put it aside for now, but shooting season for me is coming up, so I will get it out and start with fresh eyes and see what I can find. While I am not a trained smith, I am a 40+ year machinist with nearly that long interest in firearms, so I am reasonably sure I can solve this problem. I also have a few rifles to compare components with as part of my analysis. I will find it, and let you know what I discover, just to add to the general knowledge base out there.
All in all, I sincerely appreciate your concern. It would surely be a shame to have an accident so easily preventable, as most of them really are.