55 Reloading Data 40 S&W

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Reloading Data 40 S&W


The .40 S&W (Smith & Wesson) cartridge, also known as the .40 caliber, has been a popular choice among handgun enthusiasts since its introduction in the early 1990s. It offers a balance between the stopping power of a .45 ACP and the magazine capacity of a 9mm. Reloading your own ammunition for the .40 S&W can not only save you money but also allow you to tailor your loads for optimal performance in your specific firearm. In this article, we will provide you with a comprehensive guide to reloading data for the .40 S&W cartridge.

Choosing the Right Components

Before diving into reloading data, it is essential to understand the importance of selecting the right components for your reloads. The three main components you need to consider are brass casings, primers, and bullets. It is crucial to ensure that these components are compatible with the .40 S&W cartridge and your firearm.

Brass Casings

When it comes to brass casings, you have the option of using once-fired brass or purchasing new brass. Once-fired brass can be a cost-effective choice, but it requires careful inspection to ensure it is in good condition. If you prefer new brass, reputable manufacturers offer high-quality options specifically designed for the .40 S&W.


Choosing the right primers for your .40 S&W reloads is crucial for consistent and reliable ignition. Small pistol primers are used for the .40 S&W cartridge. It is essential to follow the recommended load data to ensure you use the correct primer type and brand for your specific reloading recipe.


When it comes to bullets, the .40 S&W offers a wide range of options to suit various shooting applications. From full metal jacket (FMJ) bullets for target shooting to hollow point (HP) bullets for self-defense, you can find a bullet design that meets your specific needs. Bullet weight is also a crucial factor to consider, as it can impact both recoil and terminal performance.

Reloading Press and Dies

Investing in a quality reloading press and dies is essential for reloading the .40 S&W cartridge. A single-stage or progressive press can be used, depending on your needs and preferences. Make sure to select dies specifically designed for the .40 S&W to ensure proper resizing, priming, and bullet seating.

Reloading Recipes

Now that you have the right components and equipment, let's dive into some reloading data for the .40 S&W cartridge. It is important to note that the following data should be used as a reference, and it is crucial to start with the minimum recommended loads and work your way up while carefully monitoring for signs of excessive pressure.

Powder Selection

When it comes to powder selection for the .40 S&W, there are several popular options. These include Alliant Unique, Hodgdon HP-38, Winchester 231, and Vihtavuori N320, among others. It is essential to consult reloading manuals or reputable online sources for specific load data using your chosen powder.

Bullet Seating Depth

The bullet seating depth can have a significant impact on accuracy and reliability. It is generally recommended to follow the specifications provided by the bullet manufacturer. However, a common practice for the .40 S&W is to have a seating depth that allows for at least 0.010 to 0.015 inches of clearance between the bullet ogive and the rifling in the barrel.

Optimal Charge Weight

The optimal charge weight for the .40 S&W can vary depending on the bullet weight and type, as well as the powder being used. It is crucial to consult reliable load data sources to determine the recommended charge weight range for your specific combination of components. Starting with the minimum recommended charge weight and working your way up is essential for safety and optimal performance.

Pressure Signs

When reloading the .40 S&W, it is important to be vigilant for signs of excessive pressure. These signs can include flattened primers, difficult extraction, bulged cases, or other visual indications of excessive pressure. If you observe any of these signs, it is crucial to reduce your charge weight and consult load data for further guidance.

Reloading Safety

Reloading ammunition carries inherent risks, and it is essential to prioritize safety throughout the process. Always follow recommended load data from reputable sources, double-check your measurements, and use proper safety equipment. Additionally, regularly inspect your brass casings for signs of fatigue or damage, as well as ensure your primers are seated properly.

Range Testing and Evaluation

Once you have successfully reloaded your .40 S&W ammunition, it is time to head to the range for testing and evaluation. Start with a small batch of reloads and carefully observe their performance. Pay attention to factors such as accuracy, recoil, and reliability. This feedback will help you fine-tune your reloading recipes for optimal results.

Storage and Organization

Properly storing and organizing your reloaded ammunition is crucial for safety and convenience. Invest in quality ammunition boxes or storage solutions that can protect your reloads from moisture, dust, and other environmental factors. Labeling your boxes with relevant information such as bullet type, charge weight, and date of reloading can help you keep track of your batches.

Troubleshooting Common Issues

Reloading the .40 S&W can occasionally present challenges or issues that need troubleshooting. Some common issues include failure to feed, failure to eject, or inconsistent accuracy. By carefully analyzing these issues, you can identify potential causes such as improper bullet seating or charge weight, and make adjustments accordingly.

Advantages of Reloading .40 S&W

Reloading your own .40 S&W ammunition offers several advantages. Firstly, it allows you to save money compared to purchasing factory-loaded ammunition. Secondly, you have the flexibility to tailor your loads to your specific shooting needs and preferences. Lastly, reloading can be a rewarding and educational hobby that deepens your understanding of firearms and ballistics.


Reloading data for the .40 S&W cartridge provides handgun enthusiasts with the opportunity to optimize their ammunition for performance and cost-effectiveness. By carefully selecting components, following recommended load data, and prioritizing safety, reloaders can enjoy the benefits of customized ammunition. Remember to always start with the minimum recommended loads and work your way up while monitoring for signs of excessive pressure. Happy reloading!