Just to be slightly difficult;
I had two occasions flying Islanders where I had to feather the prop and shut down the engine due to severe loss of oil pressure, the first occasion being a failure of the vacuum pump oil seal, the second being a catastrophic engine failure.
On both occasions the prop did not move to a fully feathered position and at single engine cruise speed (really cannot remember now but must have been about 85KIAS) the prop still flicked over a half or so a turn every 15 to 20 seconds!