My buddy just bought used a Browning BL22. First trip to the range and he experienced a bunch of failures to extract.
This only happened towards the end of the magazine. he would get anywhere from 5-8 rounds off, and then the gun would fire, but the bolt would be locked up.
A gentle nudge on the lever and a spent round would be pulled from the chamber clearing the gun.

On more than a few occasions a firm pull on the lever was required. This would open the actin, but leave the spent round stuck in the chamber. We would then have to use the tip of a fine screw driver to pull the empty case from the chamber. The cases did not slide out easily.

I just finished taking the gun apart and giving it a good cleaning. The rifle was not that dirty.
I made sure I cleaned the chamber real well as well as the action and barrel.

Any advice on what I should take a look at before I bring it back out for another test fire?

P.S. When the gun was running well, he was getting around 1" groups with it at 20 feet or so.