Ok guys, I can usually find all of my answers with the search button, but this has got me stumped.
I have had several brass cases fail to extract and end up stuck in the chamber of my rifle during the past couple trips to the range. The rifle is a basic stock Colt M16 Commando. Total round count for the rifle is around 9-10 thousand. Rifle is always fired wet using Slip 2000 ewl. This only happens on full auto firing when the rifle is hot, and only with Winchester 55 grain FMJ 5.56 white box. The stuck cases have to be removed with a cleaning rod or by hitting the stock on the ground while pulling back the charging handle. Once the malfunctions start, I have tried switching ammo (.223 and 5.56 both) and the problem stops. I also tried a different case of Win 5.56 white box and the stuck case problem will come right back.
I put in new gas rings, ejector spring, heavy duty extractor spring and get the same results.
I will probably just stay away from the ammo, but I wanted to get some opinions.
Thanks


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