The Nosler 300 Rem SA Ultra Mag Unprimed Rifle Brass (Nosler part no. 10228) gives handloaders a box of 25 precision unprimed rifle cases built for the 300 Rem SA Ultra Mag cartridge. Nosler manufactures this brass to consistent internal and external dimensions, which keeps chamber pressure and velocity predictable from round to round. It’s the brass handloaders reach for when building accurate, repeatable rifle loads for hunting, competition, or long-range precision work. Shipping unprimed, it leaves primer selection entirely up to you.

Key Specifications

• 300 Rem SA Ultra Mag chambering matches this cartridge’s published case dimensions for a correct, safe fit.
• 25-case box gives handloaders enough brass for several reloading sessions before reordering.
• Unprimed condition lets you seat the primer of your choice to fine-tune ignition for your specific load.
• Bottleneck rifle case construction is built for reloading, not for use as loaded ammunition.
• Magnum-class case construction is built to handle the higher pressures of this belted or beltless magnum chambering.
• Nosler head stamp on the case head confirms authentic Nosler-manufactured brass.
• Made in the USA manufacturing backs this brass with Nosler’s domestic quality control.
• Weight-sorted brass is matched for consistency to reduce velocity spread between rounds.
• Premium Brass product line designation reflects Nosler’s component-grade quality standard for this case.
• Approximate box weight of 1.0625 lb is useful for planning shipping on bulk brass orders.

Frequently Asked Questions

Is this brass primed? No. It ships unprimed so you can seat the primer of your choice for your specific load.

What caliber is this Nosler brass for? It’s manufactured for the 300 Rem SA Ultra Mag rifle cartridge.

How many cases come in a box? Each box contains 25 unprimed cases.

Buy the Nosler 300 Rem SA Ultra Mag Unprimed Rifle Brass

Stock up on Nosler 300 Rem SA Ultra Mag Unprimed Rifle Brass for your next reloading session. Order through Nosler’s brand lineup in our reloading brass selection, and our Lubbock, Texas team can help you match primers, powder, and bullets to round out the load.