Are these S&B .357 SIG cases primed or unprimed, and what type of primer pockets do they feature?

These are virgin, unprimed cartridge cases sold in packs of 50 pieces. They are manufactured with a Small Pistol Boxer primer pocket design, allowing handloaders to select their preferred primers and custom powder charges.

What are the pressure limits and specific cartridge compatibility rules for loading these cases?

These cases are engineered exclusively for .357 SIG chambers and must not be used in firearms chambered for 40 S&W or 9x19mm. They are designed to withstand standard maximum average pressures up to 40,000 psi (2,758 bar) SAAMI or 3,050 bar C.I.P.

Do I need a firearms licence to purchase unprimed brass cases in Australia?

Yes. In Australia, cartridge brass is a controlled component governed by state and territory firearms legislation. Purchasing and possession require an appropriate firearms licence or a recognized dealer/reloader permit depending on your jurisdiction.

What reloading accessories or case prep products pair well with these bottleneck cases?

Because of the bottleneck design and high operating pressures of the .357 SIG cartridge, proper case lubrication during full-length resizing is critical. Using a quality lubricant like Redding Imperial Sizing Die Wax helps ensure smooth sizing and prevents stuck cases.

357 SIG Brass - Sellier and Bellot V316952

The Sellier & Bellot .357 SIG Unprimed Brass Cases (50 Pack) provide factory-new, virgin cartridge brass engineered for handloading and reloading ammunition for firearms chambered specifically in .357 SIG. Manufactured by Sellier & Bellot to standard C.I.P. dimensional tolerances, each drawn brass case features uniform case wall thickness and an average unit weight of approximately 5.0 grams. These unprimed cases feature Boxer primer pockets designed to accept standard Small Pistol primers, allowing reloaders to configure custom powder charges and primer selections for high-pressure bottleneck handgun cartridges.

Key Features

Virgin Cartridge Brass: Drawn from standard cartridge brass to precise C.I.P. geometry, delivering consistent neck tension and an internal case capacity of approximately 19.5 gr H₂O.
Standard Boxer Pocket: Machined with a Small Pistol Boxer primer pocket to fit standard reloading press priming systems and conventional Small Pistol primers.
Pressure-Tolerant Construction: Factory-engineered to withstand standard maximum average pressures (MAP) up to 40,000 psi (2,758 bar) per SAAMI specifications and 3,050 bar per C.I.P. standards.
Consistent Unit Weight: Uniform production yields cases averaging 5.0 grams each, packaged in a 50-piece pack.

Product Specifications

Brand: Sellier & Bellot (S&B)
Manufacturer Part Number: V316952
Calibre: .357 SIG
Component Type: Unprimed virgin brass cases
Primer Pocket Size: Small Pistol Boxer
Quantity: 50 pieces per pack
Average Case Weight: Approximately 5.0 g per piece
Internal Capacity: Approximately 19.5 gr H₂O
Maximum Average Pressure Limit: 40,000 psi (2,758 bar SAAMI) / 3,050 bar (C.I.P.)

Who is the Sellier & Bellot .357 SIG Unprimed Brass Cases 50 Pack for?

Handloaders loading .357 SIG ammunition for target shooting — relies on virgin .357 SIG cartridge cases with an internal volume of approximately 19.5 gr H₂O and standard Small Pistol Boxer primer pockets to establish consistent powder burns and uniform neck tension for accurate bench and range practice.
Reloaders competing in disciplines such as IPSC using .357 SIG handguns — requires case head integrity capable of withstanding maximum average pressures up to 40,000 psi to run reliable, full-power match cycles packaged in convenient 50-pack batches.

Less suitable for: Firearm platforms chambered in .40 S&W or 9x19mm, or any load recipes exceeding a maximum average pressure of 40,000 psi (2,758 bar); shooters using these alternative calibres require straight-wall 9x19mm or .40 S&W unprimed brass cases matched to their specific chamber dimensions.

SKU	SAB42100LP
Model #	V316952
Brand	S&B
Shipping Weight	1.0000kg

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Sellier And Bellot V316952 Brass Cases 357 Sig 50 Pk

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