Injector replacement didn't solve my issue, thoughts?

[Hammerhead]

Fuel pressure test results as follows:
Specs from Insite: Results in Bold
Results are from Insite -> Data Monitor/Logger
Test gauges with CompuLink connectors not available

Cranking: greater than 100 psi at 130 RPM for at least 10 seconds: Result; 203psi @ 170 RPM cranking
Low idle: 230 to 274 psi @ 600 RPM: Result; 261-262 psi @ 600 RPM
High idle: 275 to 325 psi @ 1800 RPM: Result; 285-287 psi @ 1800 PRM

Not Insite specific, but Other noted Result;
275 psi @ 1200 RPM
285 psi @ 1540 RPM (where the "knock" is most crisp/sharp)

So notes are;
I double the min pressure cranking at 70 extra RPM
I am closer to the high end of the scale at 600 RPM
I am closer to the low end of the scale at 1800 RPM
I have virtually no increase in rail fuel pressure from 1540 to 1800 RPM