Over the years, I have found that a handgun sighted in for one person, may not be sighted in for another. There are a few reasons for this. For example, the eyes may see the sights differently or the way the shooter holds and the resistance to recoil may come into play. I also have found that sighting in from a bench rest, may not be the same when fired from a standing position. Lastly, if I'm shooting good groups, say 3" at 25 yards, and my shots aren't close to point of aim, I probably need a sight adjustment.