You aircraft is supposed to be able to reach red-line RPM at full
throttle.
If it's not, your prop is misadjusted, or something is up with your
engine.

I've never heard that. Where did you get that info?

My A&P.

One caveat: This is with a constant-speed prop. Fixed pitch props may be
different.

With our CS prop, there is an adjustment screw can be turned one way or
'tother to adjust the maximum/minimum prop pitch. This is adjusted until
the tach is just touching red-line at full throttle.

Anything less than that, and you are not taking best advantage of the
prop/engine combination.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"