Almost every person I have seen at the range that shoots .357 Sig were shooting .40 S&W guns with a conversion barrel. Pretty much ever one of them said they prefer the .357 Sig. Just they liked having the option of shooting .40 if they could not get the ammo. In fact during the bad ammo drought after the 08 election it was one of the rounds that could be found on the shelves of a few stores in town. Acadamey was selling Monarch brass for close to what Winchester, and Federal .40 S&W was selling for. Price differance was about $1.50 more per box.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.