Thank's for the reply.I don't think that the gun or more specifically the trigger is dirty,since i keep my pistols in tip-top shape.The funny thing, though is that the hammer never releases while firing it,and one would believe you would have an unwanted discharge,since there is more force emanating from the slide during firing than by just releasing the hammer once.Another thing i just found out is that i can prevent the hammer from releasing by squeezing the trigger while releasing the slide.I do know,that that is not a safe practice and be assured,i'll get it checked out by a gunsmith.
Thank's anyway.
Greg