40 S&W Brass | Once Fired 40 Brass



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The 40 Smith and Wesson once fired brass is available from Diamond K Brass. Its available in both reloadable brass and nickel casing. We offer 40 S&W once fired …

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The Intriguing World of 40 S&W Brass: A Guide for the General Public

Have you ever wondered what makes your handgun tick, or rather, bang? It’s not just the design of the gun or the skill of the shooter but also the heart of the ammunition: the brass. Specifically, we’re diving into the world of 40 S&W Brass, a popular choice among gun enthusiasts and law enforcement alike. But why? Let’s unpack this mystery together, shall we?

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The History of 40 S&W Brass

40 S&W Brass didn’t just appear out of thin air. It was born out of necessity in the late 20th century, a time when law enforcement needed a reliable round that bridged the gap between the firepower of a 9mm and the stopping power of a .45 ACP. Imagine it as the Goldilocks of handgun ammunition: not too big, not too small, but just right.

Understanding the Basics: What is Brass?

At its core, brass is an alloy of copper and zinc, known for its durability, corrosion resistance, and excellent electrical conductivity. But in the world of ammunition, it’s prized for its ability to hold the bullet, gunpowder, and primer together, ready to leap into action at a moment’s notice.

Why Choose 40 S&W Brass?

Choosing 40 S&W Brass is like choosing a reliable friend. It’s known for its balance between recoil and power, making it a favorite for both new shooters and seasoned professionals. Plus, its durability means you can reload it several times, offering more bang for your buck.

The Manufacturing Process

The journey of 40 S&W Brass from raw material to the magazine of your handgun is a fascinating one. It involves precise engineering, from casting the alloy to shaping it into the perfect casing, each step ensuring the final product can withstand the pressures of firing.

Reloading 101: The Art of Reusing Brass

Reloading is not just about saving money; it’s about crafting the perfect round for your needs. 40 S&W Brass lends itself well to reloading, thanks to its robustness. It’s like giving your brass a second life, each reload a testament to its enduring nature.

Comparing 40 S&W Brass to Other Calibers

When stacked against its brethren, 40 S&W Brass holds its own. It offers a middle ground in terms of size, power, and recoil, making it a versatile choice for various shooting disciplines.

The Environmental Impact

Every choice we make has an impact on the world around us, and choosing 40 S&W Brass is no different. By opting for a reloadable casing, you’re not just saving money; you’re also doing your part to reduce waste and preserve our planet.

Cost Analysis: Is 40 S&W Brass Economical?

In the world of shooting, the cost of ammunition can quickly add up. Here, we’ll break down the cost benefits of choosing 40 S&W Brass, from the price per round to the savings from reloading.


  • Wet-tumbled and polished, once fired .40 S&W pistol brass sourced from indoor ranges
  • May include a variety of headstamps and manufacturers
  • Spent primers are still in the cases and should be removed before beginning the reloading process
  • Extra brass cases are included to make up for any mixed calibers, unusable pieces or other defects that may slip through our screening process
  • It’s typical to find some nested calibers (9mm, .380 ACP, .357sig, or 10mm brass) mixed in due to the similarity in size and appearance when processing large quantities of brass. The total amount of 40S&W brass should still be equal to or greater than the amount you ordered due to our inclusion of extra brass by weight.
  • It is also not unusual to find some .40 S&W brass that is slightly bulged from having been “GLOCK shot.”  If you do not intend to full-length resize your brass during the loading process, we would recommend that you purchase our fully-processed .40 S&W brass that has already been resized.
  • We typically ship within one to two business days of receiving your order.  Orders are shipped through USPS Priority Mail and come with free shipment tracking.
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