A few years ago a friend of mine was doing some load testing with a .338RUM shooting over Chrony. First shot, the crony wiggles a little bit. He thought it was the muzzle blast. Second shot, same results. Third shot was a charm. It centerpunched the Chrony dead center.
First two shots just nicked the top of the box.
No one except me shoots over my Oehler.
