Same in my commander, except O/B is 42" MP.
So I normally use 40" on take off (which can be fun jiggling the throttle on the take off roll as you normally get an increase in MP as the roll gets faster), once the flaps are up reduce to 36" and leave prop full forward for the climb (as per the POH). At TOC MP back to 31" and RPM back to 24" for a fast cruise.