Are you asking for the type or the pitch or both? Someone once told me that if I were gonna be hitting stuff to forget a stainless prop. Not because of the expense. If I recall correctly, it was because it would be to hard on the engine. In other words, the aluminum would bend, break, whatever but acted like a shear to absorb what the hard prop transfered to the motor. I bought a boat once where the dealer let me borrow 3 props to see which one put the RPM's in the correct range while wide open. My current prop when I install it, which ain't often since I prefer the jet and hate the trouble of lowering my motor, is not the correct pitch.
Marriage is like Black Jack 21, get dealt a 20 and you hold what you got. No plans of taking another card