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6mm Creedmoor (+SRP) Brass Cartridge Cases

Peterson Select

The 6mm Creedmoor Brass Cartridge is manufactured on Peterson Cartridge’s new, state-of-the-art case line which uses cutting-edge technology to produce some of the most precise and consistent casings on the market. Peterson Cartridge Co is committed to producing Match-Grade Brass that enables our customers to get more reloads per casing than industry average.


At Peterson Cartridge, we frequently get requests to make casings in a new caliber. When requests for a specific caliber reach a tipping point, we add it to our development schedule. The 6mm Creedmoor was born out of demand for this product in small rifle primer (SRP), and a flash hole of .060.

All casings in a 50-count box are guaranteed to be within one grain of each other. They are also sorted by overall length and guaranteed to be consistent to within .001 inch.

Additional Information

Casings with small rifle primer pockets get more reloads than ones with large pockets. For competition shooters, more metal around the pocket means extended and maximized use. The first three or so times a casing is fired the more it forms to the shooter’s chamber, resulting in more consistent muzzle velocities. Frequent reloading after the break-in period are ideal.

The 6mm Creedmoor is also available in large rifle primer pockets. Larger primers seem to be less temperature sensitive, performing more reliably in cold weather. Ideal for someone wanting to use their gun to hunt deer.

Warning: Only use Peterson Cartridge Co. casings in firearms in good condition, designed, marked, and chambered for this cartridge. Do not use Peterson Cartridge Co casings for “fire forming” or any other purpose other than what they were designed and tested for. Peterson retains no responsibility for the enclosed casings if they are used outside of the manufacturer’s recommendations.

Many competitive shooters prefer Small Rifle Primer pockets (SRP) because they experience longer primer pocket life due to the increased material in the head of the case. There is also a belief that Small Rifle Primers produce a more consistent ignition. Some people even report better groupings and lower velocity spreads.

However, SRP are not recommended for shooting in extreme cold or hot temperatures. And Small Rifle Primer Brass sometimes requires the firing pin on your gun to be bushed. This depends on your rifle and your bolt. If that is not done, you risk getting pierced primers. For more information on bushing your firing please watch this YouTube video

To make sure you don’t have any problems talk to your gunsmith and understand what your rifle is set up for before using SRP brass. Doing that will make sure your reloading and shooting experience is much more enjoyable.

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Extremely consistent, American-made brass rifle casings and ammunition, designed for long-distance shooters.