.357 SIG

.357 SIG
.357 SIG jacketed flat point cartridge
Type	Pistol
Place of origin	Switzerland United States
Production history
Designer	SIGARMS / Federal Premium Ammunition
Designed	1994
Produced	1994–present
Specifications
Parent case	10mm Auto
Case type	Rimless, bottleneck
Bullet diameter	9.02 mm (0.355 in)
Land diameter	8.71 mm (0.343 in)
Neck diameter	9.68 mm (0.381 in)
Shoulder diameter	10.77 mm (0.424 in)
Base diameter	10.77 mm (0.424 in)
Rim diameter	10.77 mm (0.424 in)
Rim thickness	1.40 mm (0.055 in)
Case length	21.97 mm (0.865 in)
Overall length	28.96 mm (1.140 in)
Case capacity	1.27 cm3 (19.6 gr H2O)
Rifling twist	406 mm (1 in 16 in)
Primer type	Small pistol
Maximum pressure (C.I.P.)	305.0 MPa (44,240 psi)
Maximum pressure (SAAMI)	275.8 MPa (40,000 psi)
Ballistic performance
Bullet mass/type Velocity Energy 8.1 g (125 gr) Federal FMJ 1,350 ft/s (410 m/s) 506 ft⋅lbf (686 J) 8.1 g (125 gr) Doubletap FMJ-FP 1,450 ft/s (440 m/s) 583 ft⋅lbf (790 J) 5.83 g (90 gr) Grizzly JHP 1,900 ft/s (580 m/s) 721 ft⋅lbf (978 J) 8.1 g (125 gr) Underwood TMJ 1,475 ft/s (450 m/s) 604 ft⋅lbf (819 J) 6.48 g (100 gr) Cor-bon PB 1,600 ft/s (490 m/s) 568 ft⋅lbf (770 J)
Source(s): 4.5" barrel for DoubleTap Ammunition, NO BARREL LENGTH GIVEN BY Grizzly Cartridge and Underwood Ammo m and 4.0" barrel for Corbon PB. See also C.I.P.[1]

The .357 SIG (designated as the 357 Sig by the SAAMI^[2] and 357 SIG by the C.I.P.^[1] or 9×22 mm in official metric notation) is a bottlenecked rimless centrefire handgun cartridge developed by the Swiss-German firearms manufacturer SIG Sauer, in cooperation with ammunition manufacturer Federal Premium. The cartridge is used by a number of law enforcement agencies.^[3]