I have never shot 300 yards with my HBR gun before and had some difficulties getting the parallax out of my scope.  I can get the Parallax out at 100 and 200 yards with adjustment but couldn't seem to get it all out at 300.  I got it minimized as best as possible and delt with it.  The scope is a Burris HBRII that I really like.  It has been rock solid and I have a lot of confidence in the scope, so I don't want to have it monkeyed with.  I have a spare scope of the same make, model and vintage in the safe that I could switch to.  I have an astigmatism that may be complicating matters also. 

The gun is working so well, and I'll likely not shoot 300 yards again until next year.  I would like to know if anybody has a suggestion on how I might go about adjusting the parallax out.  So far, I have adjusted the objective and then the eye focus.  For all of you scope gurus out there, what is the proper way to adjust the parallax.

Any suggestions.