I have tested two other props now

Mirage 23 plus same speed faster on plane, better Acceleration ( same rpm ) ??

Bravo1 22 pitch same speed, far the best all over prop so far. (same rpm) 59 mph

Maybe I have a revlimit on 5000 rpm, find it strange that all 3 props have more or less same rpm ... ??

Just thinking out loud...
How much speed loss may be due to the painted bottom?

I do not know there are at least 7 season with self polish bottom paint on the boat

If I should guess, best case 2 mph, worst case 4 mph

Maybe someone have any experience regarding this matter ?

One of the projects this winter is to get rid of the bottom paint ;-)