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I had the same problem with an 03-A3 about 20 years back. Caused by wear in the neck portion of the chamber. I tried all sorts of lubes and ammo. Maybe you will have better luck but it took a new barrel to fix mine.
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09-11-2011 10:08 PM
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Advisory Panel
Sounds like your barrel has insufficient leade. Have a gunsmith check it out. That ring on the case mouth may be caused by the case entering the rifling too far, which will cause elevated pressure by holding the bullet in the case too long. You are either short chambered or your cases are too long.
jt
Last edited by Jim Tarleton; 09-12-2011 at 02:09 PM.
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"Me. All the rest are deados!"
67th Company, 5th Marines 1st Sgt. Daniel "Pop" Hunter's response to 1st Lt. Jonas Platt's query "Who is your Commander"?, Torcy side of Hill 142, Belleau Wood, 8:00 am, 6 Jun 1918.
Semper Fidelis!
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Legacy Member
CMP sold a pile of barreled-receivers that had short chambers. I'll guess you have one. A finish reamer is necessary and a good 'smith can fix it in 15 minutes.
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