Wow! If I recall, one of the comments made by @frugalangler recently mentioned that there will be cases where the trim will only be used a very small amount in some instances. Maybe yours is one of those?
I doubt it, I'm with Charlie on this one, need more data to narrow down what's going on, but my suspicion would be it needs a J/P if not got one, set up correctly, and then see what's up. His suggested set point is right on for that boat to start, I've set up a couple in our club and that's where we started. the SS prop to start with would be either a Tempest Plus (about the best 3-blade for the price going) or a Fury 3, but some boats just don't respond to the Fury the way you'd expect. IF you start w/ the 26P get data on RPM vs. Speed (GPS) vs. water pressure with your normal running load at Wide Open Throttle (WOT) - I really suspect you're gonna be low on RPM from what that motor should spin at WOT, but that all depends on your running load. If your trim IS working correctly and you still can't get into the trim a little at 25+ without the bow pointing at the moon, then you might need some negative wedge to tuck the motor under more - make sure when you are launching (taking off, not unloading from trailer) that your motor is trimmed ALL the way down, many make the mistake not doing that thinking trim doesn't need a lot of adjustment (trim is something you are ALWAYS adjusting on a bass boat) - that boat will launch and the bow will roll over (come down level) within about 4 seconds if set up correctly, and then adding trim once you're underway and accelerating you should from my experience be about 3/4 +/- 1/8th of max trim running on plane.
The other question? what is your tackle load and where are/is it stored, you'd be surprised how much weight soft plastics add.