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Yes, I have. The problem occurs when you get a sticky case (after firing) and open the barrel. The extractor wants to move the stuck case, but can't. When you push down harder on the barrel to open it, the short side of the "L" on the extractor gets bent inwards - it is stuck under the extractor groove of the rimless case. Eventually, your arm wins and the extractor loses. In worst events, the extractor even slip out from under the case.
If you look at the extractor with no round inserted, you'll see the bend.
You can carefully bend it back, but it's weakened forever. Oddly, this seems to happen most often (almost exclusively) with rimless cases. I think the cut needed to install the spring for the rimless style extractor is part or most of the reason. Rimless extractor are simply weaker due to that cut.
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