Yeah, I don't know what pitch props you have but they seem like they are in the ball park. I ran a prop slip calculation with your speed figures using 17 pitch and it came up 2.88% so evidently they aren't 17 pitch.
I had my wife with me and she hates to go fast so I was only able to run up to full throttle for a few seconds before she threatened with the fish knocker so there was no time to play with my trim. I have my trim gauge calibrated so 3 bars puts the anti-ventilation plate parallel with the keel and that is where I had it when I found 5K rpm to be WOT. No doubt if I trimmed on up a bit more to fine tune it, the rpms would have been a little higher. If the sea state is calm enough to run fast I normally trim up in increments till I sense a little porpoising and then trim back down till that stops. I didn't have the time yesterday. It was too rough outside and too busy on the inside. The snowbirds are still clogging things up a bit here, although it is less than a month or so ago.