NOSLER 10135 PREMIUM BRASS 257 ROBERTS 50 RNDS

Nosler Premium Brass (10135) gives reloaders a fully prepped, unprimed 50-count box of .257 Roberts +P rifle brass, purpose-built for handloaders who want to build consistent, accurate loads for one of the most capable classic deer and hunting cartridges available. These unprimed .257 Roberts cases come out of the box ready to prime, charge, and seat, making them ideal for precision reloading of 257 Roberts hunting and target ammunition.

Key Features

• Manufacturer part number: 10135
• Caliber: .257 Roberts +P
• Quantity: 50 unprimed rifle cases per box
• Case status: Fully prepped, unprimed, and ready to load
• Case mouth: Chamfered and deburred
• Flash hole: Deburred and checked for proper alignment
• Brass sorting: Weight sorted for consistency
• Inspection: Hand inspected to exact dimensional standards
• Origin: Made in the USA
• Head stamp: Nosler custom head stamp

Special Features

• Weight sorting separates cases by mass before packaging, so each piece in the box starts with uniform brass density that supports consistent powder charge ignition and velocity spreads.
• Hand inspection at the factory verifies that every case meets exact dimensional tolerances before it ships, reducing the chance of sizing issues or case failures at the bench.
• Deburred and checked flash holes confirm proper alignment on every piece, removing a variable that can cause ignition inconsistency from load to load.
• The plus P designation means the Nosler Premium Brass (10135) is built to handle the higher operating pressures of plus P .257 Roberts loads, giving handloaders full access to the cartridge's velocity potential.
• Nosler's custom head stamp makes it easy to identify and track this brass through multiple reloading cycles.
• The .257 Roberts +P case also serves as a parent case for wildcat cartridges such as the .257 Roberts Ackley Improved, making this brass compatible with fire-forming projects beyond standard Roberts loads.

Practical Benefits

• Because the case prep work is already done, you spend your bench time loading instead of chamfering, deburring, and inspecting individual pieces.
• Weight-sorted brass supports tighter standard deviations in muzzle velocity, which translates directly to smaller groups at distance on paper targets and cleaner field performance on game.
• The fully prepped condition fits hunters who load limited quantities of premium hunting rounds each season and want dependable brass that performs from the first firing.
• Reloaders working with bolt-action deer rifles chambered in .257 Roberts will find these cases size, feed, and extract smoothly across a range of die brands and press setups.
• The .257 Roberts cartridge handles bullet weights from 75 grains up through 120 grains, so this brass is compatible with a wide range of hunting and varmint bullet selections depending on your intended use.
• If you handload a classic .257 Roberts hunting rifle and want brass that shows up ready to work, the Nosler Premium Brass (10135) in .257 Roberts +P is a solid fit for precision-minded hunters and dedicated reloaders.