Following the owner's manual, remove the barrel, making sure you place the guide rod and associated springs in a place where you can reassemble them in the same OEM orientation.
Drop the 'offending' cartridges into the chamber (rear of barrel) one at a time. All the cartridges should lay in the chamber and the base of the cartridges should be exactly flush with the rear of the chamber/barrel. If the cartridges are out a bit, try pushing it in with your finger until flush, then try to push the cartridge back out through the muzzle.
You should see markings on the bullet and/or on the case, where the case headspaces at the mouth. If the casings are a tad too long or not properly taper-crimped, it could be a problem with that batch of ammo.
If it is happening with more than one kind of ammo, do the same thing with any other that are a problem to see if those cases or bullets get stuck.
Thoroughly clean the barrel/chamber, then try the above "test" again with the same cartridges (and/or others from the same lot). Cleaning the barrel and chamber may resolve the cartridges not fully-seating or it may not have changed anything. Our hope is that it did, in fact change things so every cartridge freely drops into the chamber and every cartridge's base is flush with the rearward end of the barrel/chamber.
Since the gun fires, but then fails to extract-eject, my take on it is you will see that the case itself is hanging up within the chamber/barrel, most likely at the taper crimp (the mouth of the case where the bullet is seated). Too tight a taper and the cartridges may fall a bit deeper into the chamber (below flush with the rear of the chamber), too little taper and the cartridges may hang on the mouth of the case, where the tapered crimp should be. You DO NOT WANT THE CARTRIDGES to be inserted deeper than the headspace of the tapered crimp as a wedging effect is happening and when the gun is fired, that wedge effect increases pressure dramatically!