.357Sig isn’t the least bit rare. Many Fed agencies and municipal PDs use it. Think .40 S&W with rebated rim and .357 business end.
Why not go with the .40 S&W ?
.357Sig isnt the least bit rare.
Which is good, because then when the TSA morons lose track of some rounds, they’ll know it’s theirs, and won’t blame some unwary traveler.
The next question is whether they’ll start wearing Kevlar vests to protect from stray rounds from their incompetent brethren?