Tuning range - Texan 357

Hello all,

I am considering a 357 Texan, and would like to be able to set it up with two tunes. The first tune for a light slug with lower FPE (maybe 150ish?) for coyotes, that could hopefully be quieted down for nighttime live stock defense. A second tune for a heavy slug with 300+ FPE if I get a chance to go after deer or hog in some exotic locale (no airgun hunting for deer in WI, sadly)

Does the gun have a good range of tuning, with hammer spring adjustment and different fill pressures, that would allow for a low FPE tune that could be made reasonably quiet for nighttime predator control or, being from and named after Texas, is it really meant to be big power, all the time?

Thanks,
-pg