OK, 
I took out the replacement gun and fired 99 rounds of Blazer Brass 95gr  FMJ (round nose variety) and had 1 failure. The extractor did not budge  during those 99 shots and for the first time in recorded history I  managed to retrieve 99 pieces of brass, a couple were out of round but  nothing like what I was experiencing before. 
I did testing with the new mag and the original mag, the one failure I  had was with the old mag, I had a premature lock open after the third of  six shots. Other than that all was well on this trip. More testing to  follow.
 
 
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