@katchaplin said in Constant Speed Propeller advice:
so 2400 RPM is less wear and tear on an engine than 2500
Let's say, it's less load. You can think of the manifold pressure as the amount of power the engine delivers per cycle and of RPM as a multiplier, i. e. how often this power is delivered. In the real world, vibration can be a concern, too. As has been truly noticed above, IO-360 is a rather enduring engine. So for purposes of setting power you reduce to 25/2500 or 25/2400 in climb mainly to increase your comfort and the comfort of those on the ground around the airport. If you don't care, you can climb at full/full.