Posted for "George Shattuck" <kloop@plantationcable.net>:

 Chat,
 No.  I level and get set in cruise with 2350 RPM, full throttle (8500 or 9500
feet MSL initially) then slowly reduce mixture while watching the EGT. At
somewhere near peak I start to get engine roughness so I slowly richen the
mixture to 50 deg. rich of that roughness point.  Normally, with just me in
the airplane and below gross I will see close to 200 knots TAS.  With my bride
along and the usual bags and maybe golf clubs and right up at or near gross
(1685 for me) I see 195 to 197 Kts TAS.
 
 I've never been able to get lean of peak as the roughness starts as I noted
above.
 
 George