357 Sig Bullets

This page contains just the projectile portion of a cartridge and is meant for reloaders. Please go to our 357 Sig Ammo Page for loaded ammo that's ready to fire.

Designed to deliver the power of a 357 Magnum out of a semi-automatic pistol, the 357 SIG’s flat trajectory and downrange energy advantage make it an excellent selection for self-defense. Yet the 357 SIG never found its footing in a country already enamoured with the 9mm and the 40 S&W, so finding ammo can be tricky.

Fortunately 357 SIG bullets for reloading are not uncommon at all. At .355 in diameter and 125 grains they are essentially identical to 9mm bullets, and as such are widely available.

As it is the 357 SIG’s parent case, it is theoretically possible to resize 10mm brass to reload 357 SIG bullets. The result is a case that falls slightly short of SAAMI spec, however. Purchasing new brass or repurposing spent 357 SIG cases is preferable.

Different sources will tell you that the 357 SIG headspaces on either the case mouth or the shoulder. You should let your handgun decide which type of headspacing it prefers. New reloaders should also take caution that the 357 SIG’s short neck may not properly seat some 9mm bullets, leading to setback. A .355 bullet with a wider bearing surface is optimal for the 357 SIG. The great abundance of .355 bullets on the market still give the handloader ample opportunity to reload this exciting cartridge!

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2 product(s)

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  1. Armscor .355 Diameter Bullets - 115 Grain FMJ - 2000 Count

    $195.00

    In stock

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    Cost Per Bullet 9.8¢ per bullet
    Bullet Weight 115 Grain
    Bullet Caliber 357 Sig, 38 Super, 9mm
    Quantity 2000
    Bullet Type Full Metal Jacket (FMJ)
    Manufacturer Armscor
    Manufacturer SKU 52253

    Customer Reviews

    Will be a repeat customer

    Hard to find reloading items in these times. They had what I wanted when I wanted it at a great price. I will be a return customer.

    Review by D (Posted on 6/24/2020)

    Great bullets at a reasonable price.

    Quality and consistent. Very easy to load.

    Review by ken (Posted on 6/22/2020)

    TOTALLY AWESOME!!!

    Great service. Good price. Awesome product!

    Review by MGERDAU (Posted on 6/21/2020)

    Exactly what I ordered.

    Ordered it came fast despite the Covid quarantin. And best of all was in stock.

    Review by Al (Posted on 6/11/2020)

    Nice plinking 9mm

    Bullets look good load fine excellent plinking 9mm. All rounds plus or minus .1 grain. Have weighed a random sample of bullets.

    Review by John (Posted on 5/11/2020)

    Good quality bullets for the money

    Was happy with the purchase

    Review by Bri (Posted on 5/11/2020)

    Good price and shoots fine

    Fairly new to reloading but they appear to be of good quality and shoot good

    Review by Fred (Posted on 5/4/2020)

    Good Stuff

    I was skeptical of their bullets but bought some anyway. I weighed them to see how close they were and they were very compatible with Berry's Bullets which I have used in the past. They measured right with calipers and most importantly, they were accurate. For punching holes in paper, these are no problem at all. Punch away......

    Review by Brad (Posted on 5/2/2020)

    Open box and missing bullets

    This is the second time I ordered from Wideners. This box was re taped shut and missing 7 bullets. I contacted Wideners and they were reluctant to respond. Been a week, and no compensation.

    Review by Scott (Posted on 4/4/2020)

    Good quality, great value.

    I've loaded and shot most of a box and am pleased with the quality and price. I'm ordering another 2000.

    Review by Mason (Posted on 1/3/2020)

    Excellent quality for the price.

    I have reloaded several thousand of these Armscor bullets. They are a bargain and shoot/group as well as almost anything out there. Excellent quality. The packaging is the best of any bullet manufacturer. Good stuff!

    Review by D.B.Cooper (Posted on 4/29/2017)

    Great Value

    Great Value

    Review by Great Value (Posted on 2/19/2017)

  2. Speer .355 Diameter Bullets - 124 Grain TMJ - 600 Count

    $74.90

    In stock

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    Cost Per Bullet 12.5¢ per bullet
    Bullet Weight 124 Grain
    Bullet Caliber 357 Sig, 9mm
    Quantity 600
    Bullet Type Total Metal Jacket (TMJ)
    Manufacturer Speer
    Manufacturer SKU 4726

    Customer Reviews

    Great deal

    I prefer 124 gr. 9mm reloading bullets, especially Speer TMJ. Enclosed base prevents leading. They also are accurate. I loaded CFE Pistol to 1127 fps (just supersonic) great for practice/plinking. Wideners has very good prices and fast shipping

    Review by Floyd (Posted on 2/17/2020)

2 product(s)