Depends on the reticle aiming point. The only 100 yard shooting I do is for load development or checking issues. Almost 100% are a 1" square that I thickened the lines to 1/4" and a 3/4" circle I put a small dot in the middle. I want equal light around or in all four corners to center my reticle/sight They were a midway target I got probably 20 years ago, and I put four of them on a 8x11 photo copy and make them by the 100. Then I cover a 4'x3' TV box and keep shooting it until it collapses. It will last several years with all the paper stacked on top of itself. If I have to I will draw one on graph paper.What's your favorite precision 100 yard target? If it's too small the crosshairs cover it, too big and it's hard to "center" the crosshairs. circle? Square? Triangle?