You will find that this rifle needs to be clean to cycle properly. The extractor on the Model 63 is for pulling out un-fired rounds such as when you are emptying the magazine. Ejection is by blowback and if the chamber is not clean, the shell will either not fully cycle or if really dirty then it will jam in the chamber. When that happens, keep the rifle pointed downrange, release magazine tube at butt, remove ammo, lock open bolt and use the reamer tip of your Swiss knife to pry out the shell. I found that after shooting 100 or so rounds the extractor would stop extracting even un-fired rounds. Wax coated bullets were particularly problematic.