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Posted: 10/19/2004 11:38:19 AM EDT
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First shot reslted in a failure to extract. New barrel, new B/BC, SP1 upper, gunsmith assembled. Ammo was Winchester Q3131 circa 1994. So what happened, rough chamber, short headspace, operator headspace?    
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That is what i thought also, the brass is rough on all sides just as in the picture. So how do I go about polishing the chamber? |
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Parrandero, hope you don't mind me piggy backing your thread but I just got my M4 back from JT yesterday and I had a new Wilson chrome lined 16" bbl installed and I had the same problem today with ripping the brass like shown in your pic. It didn't do it for the first 30-60 rds but the next 20 it did almost every round and then the last 30 it did fine. I thought it was my brass which was a mixture of reloads and new winchester white box from wal-mart (go figure), but I have never had this problem until today. What's the likelyhood of this just being bad brass? |
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