I'd sure like to see some close ups of the bullet holes in the cardboard from the 100 and 200 yds targets. If they are less round at 200 yds, then bullet stability IS the problem. Finding the cause of the problem may, however, be problematic.
If I'm able to make it to the ranch this weekend I'll get you some pictures of the backboard. But I seem to remember, they were round. I saw no signs of tumbling.
BP...
