my experience has been that new shooters generally aren't good enough to worry about a correction chart for a while because they do so many little things slightly wrong that they can't get a tight enough group to make use of one. A bigger help when you are a new shooter is to have someone load your magazine or revolver cylinders WITHOUT YOU LOOKING with snap caps in random places so that you can see what you are doing when you think the gun will go off (Such as flinching left or right or pushing up or down). It worked really well for me anyways.