Before you do anything else - go to the Pedersoli web site and look under "support" - "general hints for rifles" - this will explain alot about that set screw - I had an accidental discharge at the range - turned out that by snapping the trigger guard closed, dropped the hammer - luckily I was pointed downrange - this should also clear up your trigger/hammer problem. Just to let you know - the set screw - with the spring - adjusted all the way down, will cause an accidental misfire - Please read the PDF on setting the set screw!!!!!!