In general, a reloader has no way of seeing "pressure signs" with any meaning until they are EXTREMELY over pressure.
Primer flattening, flow, and pin cratering is hugely dependent upon the specific primer cups being used, as well as dependent upon the geometry of the firing pin (and power of the striker/hammer spring). Case head expansion is a function of the brass strength and chamber geometry. Brass and primer cups are designed with sufficient safety margin over their standard operating design parameters that you should expect to never see pressure signs at max pressure loads - the brass and primers are not living on the razor edge of potential failure on every shot. So you should NOT expect to see "pressure signs" from a max load, nor from a load notably ABOVE SAAMI max pressure.
Contextually, since you are considering 9mm Para - remember 2 things:
1) SAAMI standards apply a Maximum Average Pressure (MAP), as well as have tolerances for Maximum Probable Lot Mean (MPLM) and Maximum Probable Sample Mean (MPSM). The MAP for 9mm Para is 35kpsi, but the MPLM is 36.1kpsi, and the MPSM is 37.8kpsi... Meaning the brass and primer cups, at a MINIMUM, must be able to tolerate within their design standards loads which exceed the target MAP by approximately 10%. The MPSM of 37.8kpsi will not be the maximum pressure measured of a sample set, it is the maximum "mean" - maximum arithmetic average - of the sample set, so half of the rounds within that sample set will be higher otherwise a lot would be considered to not be SAAMI compliant. So at minimum, you should expect to see no signs for at LEAST a 10% over-charge.
But...
2) The same 9mm brass and primers are used for +P loads as for standard loads. So with a 35kpsi SAAMI MAP for standard pressure 9mm, those cases and primers are also known to tolerate +P pressures, which are 38.5kpsi MAP, 39.7kpsi MPLM, and 41.5kpsi MPSM... This means that 9mm brass and primers shouldn't be showing pressure signs for even up over 41,500psi.... That's an 18.6% overcharge by pressure....
I feel going to 4.4gr will get me to the Ranger velocity.
Looking at your data, I'd bet HEAVILY against 4.4grn achieving the speed you've posted for the Ranger ammunition. Plotting the data you shared, and without doing any error analysis, going up to 4.4grn would increase the speed in your SA to 969fps, and in your FX to 1011fps, you'd have to be 4.5 to achieve 980 and 1127fps, respectively...
That said, your TP9's are (indirectly) rated to shoot +P ammo, so you CAN have some confidence that you can likely push that speed, if you feel the need. Just recognize that it would be a 9mm+P load, and as such, you may want to increase your recoil spring rate, and might want to confirm with Sig that the bullet will handle the pressure and speed (shouldn't be a problem, but worth the phone call).
