Hey Outlaw, Sounds like you have a definite problem. It sounds like you are running pretty high RPM's...I don't think that you're running a true 5300 as the rev limiter should kick in right around 5200. You should definitely switch to a different prop. Your planing problem has me baffled as a smaller pitch should bring you out of the hole faster. Since your boat is a little heavy, I would suggest a four blade 25P prop. Possibly a Hydromotive QIV???
Hope this helps!!
Dave