New Barrel Trouble

[Scalce]

I had a similar issue and believe it or not, I was bumping back the shoulder too much and the extractor was not able to grab the rim.

The round would fire, the case would stay in the chamber, and I would have to knock it out with a cleaning rod.

I came to the conclusion that I could not use LC brass as no matter how much I resized, it would not drop in my case gauge.

This may not be your exact issue but keep it in mind.