I have just purchased a hw100 laminbated Before adding the scope decided to fire 14 rounds The gun comes in the box with cylinder seperated - so screwed it on and charged it with air, Almost emptied the magazine and realised air cylinder was not screwed on far ebough - pellets were loading but not being fired Now I feel stupid and have 13 pellets jamming the barrel Can i rod the barrel to clear Any comments would be appreciated PS now the cylinder is screwed in further I get a hiss of air on firing