Tico,
I don't ever calculate slip in real world I don't find it very useful, however I calculated it based on the Mercury Slip Calculator, attached is a screen shot with what Mercury came up with? This is based on 6300 RPM. The Verado RPM range is 5800 to 6500.
I can only tell you what the number are based on real life. Like I said I keep meticulous notes and when I test props I watch everything very carefully. They are what they are. I have no need to fudge the numbers.
I'm appreciate the feedback , all I can say is the number are what I tested at???
Revised Prop Slip Numbers: