So no one can help answer this question?

 

State Police:
Delaware Sig P229 (.357Sig)
Montana Sig P229 (.357Sig)
North Carolina (.357Sig)Went from Beretta Cougar to M&P and now P226
Oklahoma Sig P226R (.357Sig)
Rhode Island Sig P229 (.357Sig)
South Dakota Sig P229 (.357 Sig)
Tennessee Glock 31 (.357Sig)
Texas Sig P229/P226 (.357Sig)
Virginia Sig P229RDAK (.357Sig)
New Mexico state police did at one time...

The Secret Service use the 357Sig - P229
The Air Marshalls use 357Sig - P250
The Social Security's OIG agents use 357Sig

The PA Game commission uses 357Sig - Glock 31
The Southern Ute Police Department And gaming commission used to have - P226 now switched to 9mm

Its an old question that comes up occasionally

 

From Wikipedia https://en.wikipedia.org/wiki/.357_SIG

The Tennessee Highway Patrol currently[when?] issues the Glock 31 pistol chambered in .357 SIG.[citation needed] The Mississippi Highway Patrol issues the Glock 31 Gen4 in .357 SIG.[34]The Bedford Heights Police Department in Ohio has issued the gen3 Glock 31/32/33 since 2008 and are currently testing gen4 Glock 31s. The Eutawville Police Department in South Carolina issues the Glock 31 in .357 SIG.[citation needed] The Elloree Police Department in South Carolina also issues the Glock 31 in .357 SIG, and the Madison Police Department in Madison, WV issues the Glock 32 in .357 SIG.[citation needed] The Gouverneur Police Department in New York issues the Glock 32.[citation needed] The Lexington Police Department in North Carolina issues the SIG Sauer P229 DAK in .357 SIG.[citation needed] The Oklahoma Highway Patrol and Rhode Island State Police issue the SIG Sauer P226 in .357 SIG.[citation needed] The Paramus Police Department in New Jersey also issues the SIG P229 in .357 SIG.[citation needed] The West Grove Borough Police Department, West Grove PA, also carry the SIG Sauer P229 in the .357 SIG caliber.[citation needed]

Both the New Mexico State Police[35][not in citation given] and the North Carolina State Highway Patrol use SIG Sauer P229s chambered in .357 SIG.[citation needed] The Herculaneum (Missouri) Police Department uses the P229 and P226 in .357 SIG.[citation needed] The Coral Springs Police Department in Florida uses the Sig P226 and P229 Enhanced Elite pistols chambered in .357 SIG.[36][not in citation given] The Orlando Police Departmentuses the SIG Sauer P229 in .357 SIG.[37][better source needed] In July 2014 it was announced that the North Carolina State Highway Patrol will equip its 1,600 officers with the SIG Sauer P226 in .357 SIG.[38]

Ottawa, Kansas Police Department carried the Glock 31 .357 SIG, but has since moved to the Glock 17 GEN 4 9mm.[39][40]

Chanute, Kansas Police Department issued the SIG Sauer P229 chambered in the caliber.

 

Oklahoma HP is now issuing Sig P320 in 9mm. Current officers can chose between the new Sig or continue to carry the P226/.357 Sig.

 

Wow, quite a few Agencies are using it. Good to know and good to see that this great round is getting some real world use. Thanks guys.

 

I thinks it's had its hay day, which is unfortunate. In fact it might be the best for rural and HPs (although I like 10mm).

NDHP even switched to the 9, I guess scores went up and so did cost savings.

 

If it's not popular that's a loss for others, but for me I have mine and ammo to boot.

 

Southfield, Michigan also use it in Sigs.

 

FWIW, Contra Costa SO, CA, recently switched from 357Sig to 9X19; and my old agency issues 9X19 but authorizes 357Sig (my G31).

Availability, cost, and cultural changes (lack of fathers teaching kids to shoot) are main reasons for the rise in popularity of the 9X19.

357Sig remains a great round.

 

FAMS Are still using the Sig P229 .357 Sig The Contract for the Sig Sauer P250 was never realized, as the pistol didn't hold up well to the constant stress of the .357 Sig cartridge. There is word that the agency may be going to the Sig Sauer P320 in 9mm.
It seems the old adage of what the FBI does...many follow... may be true.
ICE has recently begun issuing 9mm again (Speer Gold Dot 53927) 124 gr +P, for Glock carriers and said they intend to buy Sig Sauer P320's.

 

What agencies are or aren't carrying the 357 Sig is at this point irrelevant to the private market. With so many variables now such as ammo cost, ease of training and the PC follow the FBI herd mentality, it's now meaningless to private gun owners what the LEA are carrying.

Everyone knows the 357 Sig and 10mm sit atop the auto handgun world. The politics of whose carrying what or not is far removed from handgun performance, which is the only concern for private gun owners.

 

I've noticed in my handloading data that the 10mm Auto isn't that much ahead of the 357 Sig in ft/lbs of energy with top loads.