>>64280344
Which sig?
High velocity pistol cartridges are neat. Depending on what gun you're looking at it may also be very easily converted to .40 S&W with only a barrel swap which is nice. 357 sig is pretty cool basically a mini 357 mag (or +P+ 9mm). Good energy and flat trajectory though it is loud as fuck as others have said, I wouldn't want it as a nightstand gun unless you're already deaf.
Ammo is kind of expensive but decent availability in my experience. Around 40-50 CPR.