It must be right on the edge. I bought a box of Hornady jacketed 170s some 20 years ago and gave them a try. I still have the targets on file. About 60% of the rounds fired were tipped at 50 yds. Not sideways, but the holes were obviously oval. I used a little jeweler's lathe to trim 0.1" from the nose of each remaining bullet in the box, and those rounds flew properly. I'm sure that vol717 is correct in saying that he's having no trouble. No two barrels are exactly alike.