finnaly took my 15-22 out for a few rounds today,i was kind of closing my eyes after a few rounds,waiting for that awful sound(KABOM) but only silance,what a releif,lol,i fed it 400 rounds,it seemed still hungry so feed it 200 more,love the gun,fed it cci hv 40g,didnt like the clunk sound after each firing,is that normal and is there a way to get rid of it