Hatsan blitz fails to load

first chase the barrel to be sure its clear .. then check the spring .. typical scenario is theres a spring play adjustment 'inside' the hammer, a large set screw facing rearward, it backs in giving way too much play and the hammer eats the spring and kinks it .. just check it all out ... i wouldnt change the rear adjuster, but carelly straighten the spring with a couple of needle nosers if its chewed, then adjust that set screw so theres about an eighth or maybe a tad less free play in the bolt 'uncoked' and fully forward ..