.357sig is a snappy, powerful round and I got to shoot it from a glock 32 and it it was nice to shoot. My buddy who had the G32 ended up trading it in for a H&K USP .45. Why? The ammo is expensive and .357 truly is a designer round to obviously mimic the .357mag. I love the .357 round but for personal defense I feel like .45acp is the cat's *****. Besides the cost of ammo for the .357sig, the biggest deterrent for me, was the chance for over penetration through walls, humans, etc. I have numerous friends in law enforcement that have issued .45s. So yes, I'm biased but there is a reason why the majority of LEOs carry .45. And the .40S&W....another designer round IMHO. :)
"The sheepdog, who expects the wolf and is prepared for it, thrives in the combat environment...and accepts the fact that on any given day there are bad people in the world who are able and willing to hurt you." --Lt. Col. Dave Grossman