I said it was as close as I could estimate and the target I measured is the exact same size 10 and appears same 9 ring. It was simply conversation and me thinking it was also a .75" group and when I measured my estimate as I said the OP was spot on. I'm 3000 miles from the OP looking at a computer not taking sides.I'm not understanding your comparison. You are measuring a different target than the OP, Browning. If you zoom in or out on the OPs target until the center darker circle is 0.5" then measure the distance between bullet 1 & 2, it appears to me you'll get about 0.75", just eyeballing it. The OP said he used a caliper to verify the software, so the center circle must be smaller than 0.5", I may be wrong. I just thought he may need to adjust his software to get an accurate number. Some people don't realize they need to calibrate each photographed target. Every time
they take a picture of the target, the camera distorts the size of the target and the software needs to be recalibrated for each photo seperately for the software to be accurate. Just trying to help accuracy.