This Nosler unprimed brass (Nosler part no. 10135) is cut for .257 Roberts (+P), a classic .25-caliber cartridge that gains extra performance from the +P pressure rating in rifles rated for it. Nosler Premium Brass is built for handloaders who want to take finding the perfect load into their own hands without doing the case-prep work themselves. Each piece is chamfered, deburred, checked for proper alignment, and sized and trimmed to proper length, then hand-inspected to ensure exact dimensional standards and tolerances are met. Each box holds 50 unprimed cases.

Key Specifications

• Cut for .257 Roberts (+P), a classic .25-caliber cartridge.
• Cases are unprimed, ready for the handloader’s own primer selection.
• Every case is chamfered and deburred before it ships.
• Nosler checks each case for proper alignment and sizes and trims it to length.
• Cases are hand-inspected to confirm exact dimensional standards and tolerances.
• Each box contains 50 cases.

Frequently Asked Questions

What does the +P rating mean for this brass? The +P designation reflects the higher pressure rating some .257 Roberts rifles are chambered and rated for; always load to your specific rifle’s rated pressure.

Is this brass primed? No, it’s unprimed, ready for the handloader’s own primer selection.

Buy the Nosler Unprimed Brass .257 Roberts +P 50ct

Order the Nosler .257 Roberts brass from our reloading brass lineup and build consistent handloads for this classic .25-caliber cartridge. Order from our Lubbock, Texas gun shop for fast, insured shipping.