I don't know why I made these... but they come in handy. Its just an NRA D1 with a premeasured 1" grid behind the scoring circles. I print these out at 50% on 11x17 cardstock for practice or I paste the center section onto a shoddily made cardboard backer as a replacement center. Its very affordable. I have three different version. NRAD1grid.pdf is a heavy lined reproduction so you can see everything from 25 yards clearly. Usefull for knowing where your shots went after your string without leaving your shooting spot. http://www.bicknellmotorsports.org/NRAD1/NRAD1grid.pdf NRAD1gridlight.pdf is the same thing only with very light stroke on the lines so that you can aim for center mass without distraction. http://www.bicknellmotorsports.org/NRAD1/NRAD1gridlight.pdf NRAD1gridred.pdf is the same thing as light only with a bright red X ring to help learn sight alignment. I also like to cut the center out of this one and tape it to shoddily made cardboard circles to practice the plates. http://www.bicknellmotorsports.org/NRAD1/NRAD1gridred.pdf I get lots of use out of them... maybe someone else will too.