I use Microsoft word to create an exact 1" grid then draw a small dot at one of the intersections in the center of the paper to point at. When you have a grid you don't need to just aim at the dot, you can align your entire reticle over the grid. Getting a rough estimate of your group size or making windage/elevation adjustments becomes extremely easy. If I could get it to work, my ideal target would be a bold 1" grid superimposed over a much lighter 1/8" grid - this would allow more accurate guessing of group size without going to calipers... if anyone can do this I would appreciate being educated on how to make it happen!