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357 SIG
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Home Ammunitions Buy 357 SIG – 125 gr TMJ-FN – Speer Lawman (53919) – 1000 Rounds
357 SIG
Buy 357 SIG – 125 gr GDHP – Speer Gold Dot (53918) – 1000 Rounds $700.00
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Buy speer gold dot 9mm 124gr – 1000 Rounds at a good price $700.00

Buy 357 SIG – 125 gr TMJ-FN – Speer Lawman (53919) – 1000 Rounds

$644.00

  • Quantity – 1000 Rounds (20 Boxes of 50 Rounds)
  • Manufacturer – Speer Lawman
  • Bullet – 125 Grain TMJ-FN (Total Metal Jacket – Flat Nose)
  • Casing – New Boxer-Primed Brass
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Description

Description

  357 SIG

 

Needing bulk 357 SIG ammo fast? Then buy a 1000 round case of this Speer Lawman 53919 ammo.

This  ammunition features a 125-grain total metal jacket flat nose (TMJ-FN) bullet, non-corrosive boxer primer, clean-burning powders, and new brass-casings.

Ammo Caliber 357 SIG
Bullet Type TMJ-FN
Bullet Weight 125 Grain
Casing Brass
Condition New
Manufacturer Speer Lawman
Manufacturer SKU 53919
Primer Boxer
Quantity 1000

History

Developed in 1994, the new cartridge was named “357” to highlight its purpose: to duplicate the performance of 125-grain (8.1 g) .357 Magnum loads fired from 4-inch (100 mm)-barreled revolvers, in a cartridge designed to be used in a semi-automatic pistol with greater ammunition capacity than a revolver. Performance is similar to the 9×23mm Winchester.

Other than specialized competition cartridges like the 9×25mm Dillon (1988), which necked a 10mm Auto case down to a 9 mm bullet, the .357 SIG (1994) was the first modern bottleneck commercial handgun cartridge since the early 1960s, when Winchester introduced a .257 caliber round based on the .357 Magnum, the now obsolete .256 Winchester Magnum (1960). Then Remington introduced the unsuccessful .22 Remington Jet (1961), which necked a .357 Magnum case down to a .22 caliber bullet, and the .221 Remington Fireball (1963), a shortened version of their .222 Remington. Soon after the .357 SIG, other bottleneck commercial handgun cartridges appeared: the .400 Corbon (1996), necking the .45 ACP down to .40 caliber; the .440 Corbon (1998), necking down the .50 AE to .44 caliber; the .32 NAA (2002), necking the .380 ACP down to .32 caliber; and the .25 NAA (2004), necking the .32 ACP down to .25 caliber.

Due to its expense, as .357 SIG practice ammo is about twice the cost of 9mm and around 50% more than .40 S&W, .357 SIG never achieved widespread adoption like .40 S&W.

Cartridge dimensions

 

.357 SIG maximum C.I.P. cartridge dimensions. All sizes in millimeters.

Americans would define the shoulder angle at alpha/2=18 degrees. The common rifling twist rate for this cartridge is 406 mm (1 in 16 in), 6 grooves, Ø lands=8.71 mm, Ø grooves=9.02 mm, land width=2.69 mm and the primer type is small pistol.

Several sources have published contradicting information regarding . This is due to the cartridge having been originally designed as a .357 (9.02mm) round, but then rapidly adapted to the .355 (9mm) bullet. According to the official C.I.P. (Commission Internationale Permanente Pour L’Epreuve Des Armes A Feu Portatives) 2008 revised documents, the .357 SIG headspaces on the case mouth (H2).  Some US sources are in conflict with this standard.9 However, the cartridge and chamber drawing in the ANSI/SAAMI American National Standards also clearly shows the cartridge headspacing on the case mouth.  Likewise, US reloading supplier Lyman has published that the .357 SIG headspaces on the case mouth.

According to the C.I.P. rulings the .It case can handle up to 305 MPa (44,236 psi) piezo pressure. In C.I.P. regulated countries every pistol cartridge combo has to be proofed at 130% of this maximum C.I.P. pressure to certify for sale to consumers.
The SAAMI pressure limit for the .357 SIG is set at 275.80 MPa (40,000 psi), piezo pressure.

Conversions 

 

While it is based on a 10 mm case necked down to accept 0.355-inch (9.0 mm) bullets, the .357 SIG cartridge case is slightly longer than .40 S&W by 0.009 in (0.23 mm) to 0.020 in (0.51 mm) total. Most .40 S&W pistols can be converted to .357 SIG by replacing the barrel, but sometimes the recoil spring must also be changed. Pistols with especially strong recoil springs can accept either cartridge with a barrel change. Magazines will freely interchange between the two cartridges in most pistols. .357 SIG barrel kits have allowed this cartridge to gain in popularity among handgun owners. However, the .It is loaded to higher pressures than the .40 S&W (the C.I.P. and the SAAMI pressure limits for .40 S&W are 225 MPa and 35,000 psi), and may not be suitable for use in all .40 S&W-chambered pistols due to the increase in bolt thrust.

Performance

The table below shows common performance parameters for several .357 SIG loads. Bullet weights ranging from 115 to 150 grains (7.5 to 9.7 g) have been offered. Loads are available with energies from 488 foot-pounds force (662 J) to 583 foot-pounds force (790 J), and penetration depths from 9 inches (230 mm) to over 16.5 inches (420 mm) are available for various applications and risk assessments. Note: Underwood now also offers a standard pressure 65 gr .357 SIG Xtreme Defender (XD) round with a muzzle velocity of 2100 fps, muzzle energy of 636 ft. lbs. and a penetration depth of 17.5 inches.

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