All You Need to Know About .300 Blackout Rifle Brass



The .300 Blackout rifle cartridge has gained much popularity recently thanks to its versatility and effectiveness. It’s widely used for hunting, tactical operations, and even sport shooting. However, for those new to this cartridge, the choice of brass can be daunting. In this article, let’s dig into the world of .300 Blackout rifle brass and provide you with all the required information you need to make an informed decision.

What is .300 Blackout Brass?

.300 Blackout brass refers to the casing used for .300 Blackout cartridges. The brass casing is the foundation of every cartridge and plays a crucial role in the overall performance of the round. The brass casing holds the primer, powder, and bullet and must be strong enough to withstand the pressure generated when the cartridge is fired.

Types of .300 Blackout Brass:

There are two main types of .300 Blackout rifle brass: once-fired and new brass. Once-fired brass is collected from previously fired cartridges, cleaned, sized, and processed for reloading. New brass is manufactured from virgin materials specifically for reloading.

Advantages of Once-Fired Brass:

  • Cost-Effective: Once-fired brass is typically less expensive than new brass, making it an excellent option for those on a budget.
  • Readily Available: As long as there are shooters who use .300 Blackout, once-fired brass will be readily available.
  • Environmentally Friendly: By using once-fired brass, you are helping to decrease waste and conserve natural resources.

Advantages of New Brass:

  • Consistent Quality: New brass is manufactured to precise standards, ensuring consistent quality and performance with every cartridge.
  • Longer Lifespan: New brass is made from virgin materials, making it stronger and more durable than once-fired brass. This means it can be reloaded multiple times without sacrificing performance.
  • Peace of Mind: When you use new brass, you can be sure that you’re using a high-quality product that has not been exposed to any unknown conditions.

Factors to Consider When Choosing .300 Blackout Brass:

  1. Quality:

The quality of the brass casing is of utmost importance when choosing .300 Blackout brass. High-quality brass will ensure consistent performance and accuracy with every shot.

  1. Reloading Experience:

If you’re an experienced reloader, you may prefer either once-fired or new brass. However, if you’re new to reloading, consider using new brass for your first reloading experience. You may have developed techniques for sorting and cleaning once-fired brass, and you may know how to work with brass that has been damaged or has other issues. Additionally, experienced reloaders may have equipment and tools designed explicitly for reloading .300 Blackout brass, which can make the process faster and easier.

  1. Budget:

Once-fired brass is usually less expensive than new brass. If you’re thinking about budget, consider using once-fired brass.

  1. Intended Use:

If you want to use your .300 Blackout for tactical operations or self-defense, use new brass for added peace of mind. Once-fired brass may be suitable if you plan on using it for hunting or sport shooting.


In conclusion, choosing the suitable .300 Blackout brass is a critical decision that will affect the performance of your cartridge. Whether you decide on once-fired or new brass, it’s essential to consider the quality of the brass, your reloading experience, your budget, and your intended use. New brass is often easier to size and prepare for reloading, as it has yet to be exposed to the wear and tear that once-fired brass may have experienced. With new brass, you can focus on learning the reloading process and mastering the techniques without dealing with the additional challenges of using once-fired brass. Considering these factors, you can ensure you’re using the best brass.

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