This is what my Google search found, so take it for what it’s worth! Grumpy
- Cost & Availability: Ammunition is more expensive and less common than standard 9mm.
- Muzzle Blast: Produces a loud report and significant flash due to high operating pressures.
- Bullet Setback: The short neck on the bottlenecked case can risk bullet movement if the same round is chambered repeatedly
- and this also.
- Despite its favorable ballistics and performance, the .357 SIG has not achieved the widespread adoption seen with similar cartridges.
- One factor preventing the round from achieving greater popularity could be the cost of the ammunition, which frequently reaches double the expense of 9 mm, .40 S&W or .45 ACP ammunition.
- Because of this, as well as availability issues, some law enforcement agencies that previously adopted the cartridge have reportedly began to move away from the .357 SIG in favor of more common rounds with comparable performance
