I have a 2005 Cessna T182T with TIO-540-AK1A Turbocharged engine that I had reman done at Western Skyways with less than 50 hours on it.  It has never passed a mag check (per the manual or previous conditions) since overhaul.  I picked her up at the factory so know what it used to do and what the book says.  Mag check should be done at full rich, but I get a 200-250 drop per mag when I run up full rich.  If I lean out some it is fine.  Just got it back from maintenance and they reworked the fuel system thinking that was the problem, it was not.  Any ideas?  I'm thinking maybe the turbo charger waste gate????  Any ideas would be appreciated, thanks in advance.  Rodney