With all due respect - I call "Bravo Sierra" on the sound issue.
Microsoft PowerPoint - Firearm Sound Briefing.ppt (larsondavis.com)
How Loud are the Weapons?
P228 9mm 159-162 dB
P229 .40 S&W 161-162 dB
P229 .357 SIG 162-163 dB
(All measured 1 meter to the left of the muzzle)Maximum Safe Sound Level
357 Sig, to me, has a very distinctive sound.
Like an AK vs an AR.
But to me, it doesn't sound any louder than 40 S&W.
Also, IMHO, reports of excessive blast and concussion are highly exaggerated.
Especially with low flash fast burn defensive ammunition.
Now the cost issue is definitely for real
Particularly with range ammo.
That's the main reason I can't, in good conscience, recommend the caliber to others.
Also, availability of ammo and very few firearms options.
Most manufactures (Hk and others) have stopped producing guns in that caliber.
It's truly a niche round these days ...