Originally Posted by ken grant
Whoops!!!! I may have figured it out.
As the barrel unlocks and drops down, the case moves down the breechface and extractor as well.
Maybe at this point the extractor shoulder bottoms out and stops any farther inward movement.
Beat me to it.
The extractor needs;
1} to move freely in/out during the entire rearward slide process till the empty leaves the gun
2} follow the case as the case moves along the bolt face
Really, folks, there is a lot more going on here than the "Limpwristing Did It!!" and "Use Better Ammo!!" crowd would have you believe.
Some of them may be good parts swappers, but they are surely no gunsmiths.