I just picked up an 8mm Mauser CZ BRNO and I have run into a problem with the extractor. I cleaned and lubed the gun and took it to the range and I found that the body of the extractor catches the sharp edge of the receiver ring. Operating with gusto helps but it still stops the bolt every 2nd or 3rd time I work the action. It only binds when the gun is chambering a round. It's as if the extractor is a few micrometers too high when chambering. The brass doesn't appear to be scuffed or damaged . It looks like filing the sharp edge a bit would prevent the issue, but I suspect there is another solution. I will add some attachments this evening, but I was curious if anyone else had this issue and if they found a solution? Thanks!
This website isn't letting me upload photos so here's a Google album.
https://photos.app.goo.gl/3Db8EgrtJnicWVB88