I have a S&W K-38 (1962 manufacture) with 8 3/8 inch barrel, it is single action and has an excellent trigger pull combined with nice target grips.

My problem is that it would occasionally fired a flyer outside of the group. I decided to test fire some targets using only three chambers each time. I was able to determine which chamber was doing this and marked it with white paint so as not to load it. The second target was at 10 meters with flyers and the first target at 25 meters using only the five good chambers.

Also had the barrel throat re-cut to 11 degrees which was also an improvement Attachment 116132Attachment 116131