Check Hartzell’s website for some engine/prop combinations with limitations, or better yet confirm with your prop mfg.   http://www.hartzellprop.com/kitplane_details.php?id=6 

Our RV6 with a 4 cyl. Lycoming O360-A1A and Hartzell 2 Blade had a “Avoid continuous operations between 2000 and 2250 rpm” limitation we were unaware of until a A&P pulled it up while assisting on a Annual.

Steve Colwell  Legacy  IO-550N