Yes that is the sear adjustment screw(single screw at back of trigger housing). Cock the rifle and slowly turn that screw clockwise until the gun goes off. Turn the screw counter clockwise 1/4 of a turn and re-cock the gun. Test the sear contact at this point. If it is good then bounce the cocked rifle on its butt a few times on a hard floor to see if it accidentally goes off. If it does not your good to go. Kimbers have one of the easiest to adjust sears out there. Good Luck
