The Sellier & Bellot (S&B) .223 Remington Unprimed Brass Cases (product model V337062) provide virgin, reloadable cartridge cases engineered for assembling custom centerfire rifle ammunition. Designed to standard SAAMI and C.I.P. dimensions, these inert cases feature factory-annealed necks to enhance ductility and support consistent case life across multiple firing and resizing cycles. Each case utilises a standard Boxer primer pocket, allowing handloaders to deprime and reprime using standard reloading die sets without specialised tools. They serve as a foundational component for custom loads intended for bolt-action and modern sporting rifles chambered in .223 Remington, 5.56×45mm NATO, or .223 Wylde.

Key Features

• Factory-Annealed Necks: Undergoes thermal stress-relieving at the neck and shoulder to increase brass ductility, reduce the risk of neck splitting, and extend reload life through multiple firing cycles.
• Standard Boxer Priming: Employs a single central flash hole configured for standard Small Rifle Primers, ensuring compatibility with standard reloading dies.
• Durable Cartridge Brass: Formed from copper-zinc alloy engineered to withstand standard .223 Remington operating pressures up to 55,000 psi (3,800 bar Pmax C.I.P. / 4,300 bar piezo).
• Inert Component: Unprimed and devoid of propellant, providing uncharged brass cases for safe handling and storage prior to assembly.

Specifications

• Calibre: .223 Remington (5.56×45mm NATO dimensional equivalent)
• Pack Quantity: 20 pieces per pack
• Primer Pocket Compatibility: Standard Small Rifle Primer (Boxer type)
• Material: Reloadable cartridge brass (copper-zinc alloy)
• Nominal Case Length: ~1.760 in (44.7 mm) (standard maximum trim length ~1.750–1.760 in)
• Base / Rim Diameter: ~0.378 in (9.6 mm)
• Empty Case Weight: Approximately 100–108 grains (6.5–7.0 g) per piece
• Manufacturer Model Number: V337062

Who is the S&B Sellier & Bellot 223 Rem Unprimed Brass Cases 20 Pack for?

• Handloaders constructing custom .223 Remington ammunition for varmint hunting — Delivers virgin reloadable brass cases featuring a nominal case length of 1.760 in and a standard Small Rifle Primer pocket, allowing shooters to develop tailored field loads for varmint species out to 500–600 metres.
• Target shooters and competitors assembling handloads for .223 Remington rifles — Provides a compact 20 pieces per pack format with factory-annealed necks for handloaders testing powder-and-projectile charge ladders or shooting low-volume practice sessions in .223 Remington, 5.56×45mm, or .223 Wylde chambers.

Less suitable for: High-volume range shooters requiring 100-count or bulk 1,000-count packaging for economical bulk reloading, or extreme long-range benchrest competitors requiring match-grade turned-neck brass with single-digit weight tolerances.