rmh -

No prop will reduce the max power of an engine - the max power will not change. Different props will change the rpm of the engine and some pilots such as you will not want that. Also your statement that using a prop at the upper end of their recommended range is overpropping is also wrong - it is only your preconceived idea of how you want to use an engine.

What you say is based on how you like to fly and will lead others down blind alleys, unless they fly your planes the way you want to fly them.

Ed