happened to me. I am fortunate that the bullet only put a hole thru it instead of busting it totally off. A couple of years ago I got on a big Wyoming bull above timberline. Cutting across the opposite slope from me he paused broadside at 642 yds. I hit him behind the shoulder 1st shot but didn't knock him down. As he was
moving on away I sent more lead his way but really couldn't tell where I hit. He was moving and in the excitement I totally forgot to re-range my target. Did I mention that I was excited? 200 yards later he laid down and expired. As we road up to him there was not any shrinkage this time but we immediately saw that I had put one though his main beam below his 5th point. It makes for a real conversation piece having a clear bullet hole thru the horn but I would of been sick if it had busted it off.