Don't be afraid to havea 'smith at least LOOK at it. I had a similar problem with my 7 mag a year ago. I mean, it was shooting EVERYWHERE but where I aimed. I would be fortunate to keep 3 shots on a sheet of notebook paper at 100 yards. Went through a bunch of of the 'usual suspects' as far as trying to figure out the problem. Finally took it to a gunsmith who figured out there was a tiny 'bulge' near the end of the barrel. Must have had a bit of dirt/ice/snow/whatever in it at some point when it was fired, which created the bulge. The 'smith cut off the last 1.5" or so of the barrel, recrowned it, and $55 later I was back to shooting MOA with factory ammo.