What type of primer pockets do these S&B .300 AAC Blackout brass cases use?

These unprimed brass cases feature standard Small Rifle Boxer primer pockets. This design accepts standard small rifle primers, making them straightforward to deprime and reload across multiple cycles.

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

Yes. Under Australian State and Territory legislation, unprimed cartridge cases are classified as reloading components and ammunition parts. Purchasing and possessing them generally requires a valid firearms licence corresponding to your firearm category, typically Category B for centrefire rifles.

What projectile diameter and maximum pressure limits should I use when handloading these cases?

These cases are designed to take a nominal .308-inch bullet diameter for .300 AAC Blackout chamberings. When handloading, you must ensure your loads remain strictly within SAAMI and CIP pressure limits for the cartridge, which have a maximum average pressure of approximately 55,000 psi.

300 AAC Brass Cases - Sellier & Bellot V337192

The Sellier & Bellot .300 AAC Blackout Unprimed Brass Cases (part number V337192) provide factory-drawn, virgin cartridge brass engineered for handloaders assembling custom ammunition. Manufactured from standard copper-zinc alloy by Sellier & Bellot, these new cases eliminate the labour, neck-turning, and case-wall inconsistencies associated with forming .300 Blackout cases from converted .223 Remington or 5.56 NATO brass. Each component is formed to standard CIP and SAAMI chamber dimensions, ready for final neck preparation, charging, and bullet seating.

Key Features

Factory Virgin Brass: Formed directly to .300 AAC Blackout (7.62×35mm) specifications, providing uniform internal volume and case-wall dimensions without requiring parent-case fire-forming or cut-down operations.
Standard Boxer Priming: Configured with standard Boxer flash holes and Small Rifle primer pockets for straightforward depriming and repeated reloading cycles on standard handloading presses.
Projectile Interface: Neck dimensions are drawn to accept standard .308-inch (7.62 mm) nominal diameter rifle bullets.
Safe Working Limits: Engineered to withstand standard SAAMI and CIP maximum average pressure limits of approximately 55,000 psi (3,800 bar).

Specifications

Brand: Sellier & Bellot
Manufacturer Part Number: V337192
Calibre / Chambering: .300 AAC Blackout (7.62×35mm)
Component Type: Unprimed virgin reloading brass cases (cases only)
Primer Pocket Compatibility: Small Rifle Boxer primer
Bullet Diameter Compatibility: .308 in (7.62 mm)
Quantity: 20 pieces per pack
Case Mass: Approximately 140–160 grains per unprimed case (varies by production lot)
Material: Drawn cartridge brass (copper-zinc alloy)

Who is the S&B Sellier & Bellot 300 Aac Blackout Unprimed Brass Cases 20 Pack for?

Handloaders creating custom subsonic hunting loads in .300 AAC Blackout — Requires unprimed rifle brass cases built to accept .308 in bullets in the standard 7.62×35mm chambering to consistently regulate the low internal operating pressures and heavy projectiles typical of subsonic shooting.
Handloaders developing high-velocity supersonic field loads for centrefire rifles — Needs unprimed virgin rifle brass with standard Small Rifle Boxer primer pockets that safely handle working pressures up to approximately 55,000 psi for flat-shooting pest and medium-game applications.

Less suitable for: Long-range shooting beyond 300 metres, or subsonic applications pushed beyond 100–150 metres where steep trajectory drop limits terminal effectiveness; higher-capacity centrefire cartridges such as .308 Winchester provide significantly greater powder volume, higher velocity, and superior ballistic performance at extended distances.

SKU	SAB42176LP
Model #	V337192
Brand	S&B
Shipping Weight	1.0000kg

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Sellier & Bellot V337192 Brass Cases 300 Aac Blackout 20 Pack

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