How do you interpret Max loads with different pressures? For example, Hodgdon data for the 40 S&W with 180gr XTP lists max pressure for all loads around 32-33K except for one. This exception is SR 4756 with a Max load pressure of 28,800psi. Why such a large difference in Max pressure? Does this mean that this powder can produce similar velocities at lower pressure or does it mean that this bullet/powder combo should be kept lower than normal cuz it has issues like getting squirrely (technical term) when loaded to SAAMI max pressures? Thanks Wanna kill these ads? We can help!