Winchester .357 SIG Ammo
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Winchester USA 357 Sig 125gr FMJ Ammunition 50rds - Q4309
Brand:
Winchester
Bullet Type:
FULL METAL JACKET (FMJ)
Caliber:
.357 Sig
Capacity:
50
Finish Per Color:
Brass
Grains:
125 grain
From:
$52.99
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20
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Winchester USA 357 Sig 125gr JHP Ammunition 50rds - USA357SJHP
Brand:
Winchester
Bullet Type:
Jacketed Hollow Point
Caliber:
.357 Sig
Capacity:
50
Finish Per Color:
Brass
Grains:
125 grain
From:
$45.57
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12
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Winchester Ammunition USA, 357SIG 125 Grain Full Metal Jacket, 50 Round Box - Dirty Bird Industries
Brand:
Winchester
Caliber:
.357 Sig
Rounds:
50
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Winchester Ammunition Super-X 125 gr WinClean (Brass Enclosed Base) .357 Sig Ammo, 50/box - WC357SIG
Brand:
Winchester
Bullet Type:
WinClean
Caliber:
.357 Sig
Grains:
125 grain
Rounds:
50
From:
$29.99
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11
(1)
Winchester 357 Sig 125gr PDX1 Defender Ammunition 20 rds - S357SPDB
Brand:
Winchester
Bullet Type:
Bonded Jacketed Hollow Point
Caliber:
.357 Sig
Grains:
125 grain
Rounds:
20
From:
$20.47
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12
Frequently Asked Questions
Winchester .357 SIG Ammo
Is the .357 SIG discontinued?
.357 SIG is not officially discontinued as a cartridge, but manufacturer support has waned significantly. SIG Sauer appears to have removed .357 SIG chamberings from their lineup, and Glock discontinued the Glock 32 in this caliber. Ammunition and firearms availability have decreased notably across retailers.
Is 357 SIG ammo the same as 357 Mag?
No, they're different cartridges. .357 SIG is a bottlenecked pistol cartridge designed for semi-automatic handguns. .357 Magnum is a rimmed revolver cartridge. Both achieve similar velocities but are completely incompatible—never use one in a firearm chambered for the other.
What is the best ammo for a 357 SIG?
For .357 SIG self-defense, Speer Gold Dot 125-grain JHP is widely regarded as the top choice due to consistent expansion and reliable feeding. Federal HST and SIG Sauer V-Crown are strong alternatives. Test any carry ammunition in your specific firearm to confirm reliable function before depending on it.
What grain is best for .357 SIG?
125 grain is the standard for .357 SIG, as the cartridge was designed around this bullet weight. It delivers the flat trajectory and velocity the round was engineered for. 115 grain loads exist but stray from the original design. Test any load in your specific firearm before carrying it.
Is .357 SIG more powerful than 9mm?
Yes. .357 SIG fires a 9mm bullet at higher velocities than standard 9mm, producing more muzzle energy. .357 SIG still maintains a meaningful velocity and energy advantage over 9mm, including 9mm +P, delivering greater energy and larger wound cavities. It costs more and reduces magazine capacity compared to 9mm.
How much does .357 SIG ammo cost?
.357 SIG ammo typically starts around $19.99–$29.99 per box for entry-level loads. Most listings fall between $29–$82 depending on brand, grain weight, and bullet type. The higher end reflects its specialty status and lower production volume compared to mainstream calibers.
Is 357 sig more powerful than 45?
.357 SIG is more powerful by velocity and energy, typically achieving 1,350–1,450 fps compared to .45 ACP's 830–1,000 fps. The .45 ACP fires heavier bullets (230gr vs. 125gr), but .357 SIG produces greater muzzle energy. The .45 ACP tops out around 400 ft-lbs with a 185gr bullet at roughly 1,000 fps.
What is the shelf life of .357 ammo?
Properly stored .357 ammo remains reliable for decades, though manufacturers conservatively rate it at 10 years. For self-defense use, replace it annually. Storage conditions matter most—keep rounds cool, dry, and away from moisture and extreme temperatures.
What grain .357 is best for self-defense?
For .357 SIG self-defense, 125–135 grain hollow points are the most common and effective choice. This cartridge is used in semi-automatic pistols, not revolvers. Federal HST, Hornady Critical Defense, and Speer Gold Dot are well-regarded options. Test your chosen load in your specific pistol for reliable feeding.
Is a 357 sig as powerful as a 357 Magnum?
.357 SIG runs higher chamber pressure and closely matches .357 Magnum performance from comparable barrel lengths, reaching similar velocities with 125gr bullets. The Magnum holds a slight edge with full-power loads, but the practical difference is minimal. The SIG's advantage is reliable semi-automatic feeding in compact pistols.
Will 357 sig work in a 357 Magnum?
No. .357 SIG and .357 Magnum are different cartridges and not interchangeable. .357 Magnum is a rimmed revolver round; .357 SIG is a rimless semi-auto cartridge. Both use the same bullet diameter but have incompatible case designs and require their own firearms.
What pistols use .357 SIG?
SIG Sauer made the P229, P239, and P2340 Pro in .357 SIG but has since discontinued all models in this caliber. Glock produced the 31, 32, and 33 in this caliber. Other manufacturers include Springfield Armory (XD series) and Smith & Wesson (Sigma series). Availability has declined as the cartridge lost popularity.
Can you shoot a 9mm out of a 357 SIG?
No. A .357 SIG chamber is designed for that specific cartridge. Firing 9mm ammunition in it risks dangerous pressure issues and potential firearm damage. Converting to 9mm is relatively straightforward on many platforms, typically requiring a barrel swap and possibly a new recoil spring or magazine, with the slide often unchanged.
Does 357 sig do more damage than 10mm?
10mm typically delivers more energy due to heavier bullets and larger diameter. .357 SIG compensates with higher velocity from a smaller bullet. In practical terminal performance they're comparable, though 10mm has a slight edge in penetration and raw power. Both are effective defensive rounds.
Is a 357 SIG more powerful than a 40?
.357 SIG produces higher velocity and better energy retention at distance than .40 S&W, using a 9mm-diameter bullet. The advantage is clear: even the fastest .40 round cannot match the slowest .357 SIG. The higher velocity delivers deeper penetration and a larger permanent wound cavity.