Analog threshold be set even higher than 99.99% or trigger calibration?

[elvisish]

To simulate the original SMS analog R trigger as closely as possible for running and spraying, I have the threshold set to 99.99%, which on an xBox One controller gives me roughly 85-90% of the trigger to run and spray, but I'd like to get it closer so it's practically squeezed all the way in before he stands and sprays. Could the threshold be tuned or calibrated for controllers so 99.99% is actually pretty much an atom before it's pressed all the way in, rather than being quite a bit less than that? 99.99% is ridiculous, but it practice it's not actually that close at all on my controller.