Last fall I was advised by 21XDC to try a Revolution 4 15P prop to bring my RPMs up into the right range of 5000 - 5500. I ran across a great deal from one of the other members on a Rev 4 17P so I bought it to try. I ended up with getting 5200 RPM at 42 MPH in my 20' Procraft 200 combo. I had a full tank of gas, me, and a trolling motor on board. Prop slip calculated out at 6%. Hole shot is good but I think it can be better once I start drilling out the plastic plugs. I am just double checking to see if this is where the numbers are expected to run with my boat and motor. As far as I know the motor is running good. All the settings and timing has been gone thru recently.