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Gunsmithing Stuck 8.6 Blk case AR10

Primed some .308 FGMM brass that must have had some prior hotter loads. The primer pockets on a few felt a little loose. One fell out sending a primed but not loaded round into battery. I couldn’t eject the case and had to hit the charging handle with some force. The case ejected out but BCG slammed back into battery. The case was missing the primer. I used force on the CH again and the primer went off.
Ultimately I had to take the front take-down pin on the lower out because, despite taking the rear take-down pin out, the upper wouldn’t open from the lower.
With the two apart I took the BCG out and there was the primer stuck in with the cam pin!
I’m sure this is similar to what my 8.6 Blk upper is doing. I just can’t get that BCG out. My smith still has it so have got to try any of the recommendations here yet.

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