Most just go with a +p 9mm and be done with it. The main selling point to the departments when the 357Sig came out was its feeding reliability for being a bottle neck cartrage.
The 40 and 9mm are still the top LE caliber. The 357Sig and 45GAP are niche calibers that I would bet will fade away like so many others before it.
"I'm a good guy with a gun" What do I care if I give up some freedom or rights?....The Goverment will take care of me. This kind of thinking is now in the majority and it should concern you.
"Ask not what you can do for your country, but what free entitlements you can bleed from your country"