A bunch of years ago, when there was only one division, or maybe limited had just started, I had a "new" C-more put on my open gun. After sighting in, thought it would be well to chrono the load to be sure. It never crossed my mind that my sight was a greater distance above the bore that the open sights were, and had a 130 FMJ drill the top center of the display, blew parts and pieces all over the place, and continue right on through the the whole unit. We were laughing so hard I had to lay the gun on the ground and hold my sides. Kept the shot up unit as a reminder for a lot of years, until it happened again this summer. No good excuses, no good stories, just a brain freeze.