Here is a couple targets I have made for doing load development work. One is 8.5x11 that I generally use for rimfire but can be used for rifle too if you have a small box. The other target I made for rifles to be used at 100-200 yards it is 18"x24" to be used on larger boxes. They both have a center area for zeroing your scope and a grey grid for estimating group size or knowing how far from center you are. The smaller target grid is half inch and grids on the larger one is one inch. I think they are pretty handy and have served me well so I thought I would share. Enjoy.