On my Russians I found that to get the lighter hammer pull that the spring adjustment screw needed to be backed out considerable, leaving it exposed on the grip frame. I started grinding allowing 1/4" from the hammer connection and perhaps 3/8 from the indentation in the grip frame. Once I had them light enough the adjustment screw then went flush with the frame as I fine tuned the feel..I was really surprised at how effective this simple procedure is. Any other BOSS pards do this?? Doc