2nd trip to the range. Still shooting low (about3-4in.) Had a friend try my Sigma he also shot low I shot his SR9c and put 4out of five in the 4'' circle with the 5th right on the edge of the circle at 8o'clock. Is the sd9 any better than the Sigma? I like the action and simplicity of the sigma. Does the sd operate like the sigma? The ruger was pretty nice!