OK if this is a statement made by the prop manufacturer am I thinking right?

*Increase pitch by one degree for every one inch decrease in diameter.
**A change in pitch of one degree is worth about 200-300 change in engine RPM. Increasing pitch will decrease RPM. Decreasing pitch will increase RPM.


Seeing the above statement, if I cut 1" from the blade am I gaining the 200-300 rpm?

I got my new blades today and at 13 degrees I am only turning the prop at 2200 rpm. The prop is 59" now and top prop speed for the prop is 3300 rpm. I would like to cut the blade some because it is just below my transom.

If I am thinking right, if I wanted 3000 rpm out of this setup I would need to cut the blades down 2", am I thinking correctly? Prop is a three blade carbon fiber.