[gar]

Noticed that casings, even new ones, do not fit flush on the breech face of my 45 ACP. There's about a .005" gap. The extractor is hitting the 45 degree transition between the rim and the main body of the case preventing it from seating flush. You can see a nick on the case in the transition area after firing.

Is this something to worry about if the gun is running ok otherwise or should I start filing the extractor down so it doesn't contact the side of the case and the case is flush with the breech face?

 

[Peter Zahn]

If everything else is OK go ahead and trim the front of the extractor to clear the case. Maybe the extractor is just a bit too long. In any event, you want the case sitting against the breechface.