How to measure a shot group: July 30, 2008

If we’re going to talk about accuracy, we have to use some easily understood means of comparing relative shot placement. Shot-group size is by far the most popular way to do this. Incidentally, the term “group” is correct; it is not a pattern. A pattern is the spread of shot from a shotgun; a group is the arrangement of shots from a gun that shoots just one projectile with each shot…. Dirt E. Harry