I use old MEC 600 jr presses in three gauges. These always throw light shot charges with the shot I use, which is primarily 7,7-1/2, 8. The charge charts I use for the powder bushings are generally light also, but it depends upon the powder. I weigh my charges to get them right when I begin using a press. I often need to vary from the chart bushing to get what I want. The chart is almost always low on powder. Now I wonder how accurate factory shot loadings are.