How does it idle? 500 rpm is the bottom end... Another 25 - 30 rpm may help
if it is idling rough...

On the issue of full rich, if you are landing at a low altitude airport then
progressivley enriching the mixture in the descent,arriving at full rich on
short final, makes sense, as the air density in the manifold will be
reasonably high, even after the turbo has spun down and is not boosting
much...
But, if you are landing at an altitude airport, then the throttle pulled
back will allow the turbo to spin down, same as for low altitude airports,
but the intake manifold air density will be low thin and full rich may
lead to a flame out - especially if you have to hit the throttle for a
missed approach, wind shear, etc... Full rich with full throttle is likely
to cause a stumble/stall at that point.... I would tend to keep it
reasonably lean during descent and approach to avoid plug fouling and to
keep it warm, only going to the 'appropriate' takeoff setting on short
final, which is not necessarily full rich at higher altitude airports...
You have already done your homework and know how far in to put the mixture
on short final for the airport you were at... For takeoff, I would run up
to 1800 rpm and lean for best power, knowing that full throttle will enrich
the mixture further, automatically... Just watch your manifold pressure and
cylinder head temps during climbout and richen slightly if needed...
denny

"Barry Klein" wrote in message
om...
We took a newer 182 turbo to a 7000' elevation airport yesterday and
the engine quit at the end of the landing roll. I'm sure the mixture
was way too rich.