Thomas Borchert writes:

When flying at 2200 RPM or so and going full power you run a
greater risk of breaking something than at full pitch (high RPM).

How?

Some airplanes have limitations on the space of usable RPM-vs-MP
settings. For example, on the pair of IO-540s in mine, prohibit
operation at MP25 with RPM2300, or MP20 with RPM2000. (I believe
the reason relates to resonance.) That is I push the blue levers
forward from 2200RPM (cruise) to do approaches at 2400RPM: this allow
harsher throttle swings if needed.

- FChE