I'd estimate the force to be 15-20 lbs at 150kts.  And static on the ground about 10lbs.  It is most bothersome on takeoff roll trying to correct for P-factor.  Especially if I'm trying to maintain directional control with the rudder instead of the brakes.  It really seems to take about 20 lbs then.  Again, it might be normal.  That's why I'm trying to see how others are.

Steve,

 

That is a bit heavy.  I recently checked a Lancair 360 project that made me feel that I was pushing the rudder pedals against setting concrete.  As was mentioned, check that the rudder springs are not contributing to the problem although I suspect binding in the transit tubes - thus requiring forced lubrication.  Bicycle shops sometimes have a device for lubricating enclosed cables, it clamps onto the tube and the cable with a port available to force in the lube.  Another problem might be something on the aft side of the firewall interfering with unrestricted movement.

 

I also have the adjustable rudder pedals on both sides.  When I built my Lancair, I straightened out the transit tubes and changed the middle cable crossover point to just forward of the seat backs resulting in no friction/resistance at all.  Indeed, I have an internal servo-operated spring-driven rudder trim system and very little foot pressure is needed to swing the rudder in the same direction as the trim. Going against the trim does not require anywhere near 20 foot-pounds (uh, no pun intended).  In my airplane, full right rudder trim is used for takeoff, climb and slow flight with flaps extended while full left trim is utilized in cruise.  Since I don't fly at any other intermediate speeds, I seldom use other trim positions.