Pistol Cartridge Case Types

Pistol Cartridge Case Types: A Comprehensive Guide for Reloaders

As a reloader, understanding the different types of pistol cartridge cases is crucial for optimizing your ammunition performance and ensuring a smooth reloading process. In this in-depth article, we’ll explore the various pistol cartridge case types, their characteristics, and how to properly handle them during reloading.

The Importance of Cartridge Case Type

The type of cartridge case you use can significantly impact the overall quality and reliability of your handloaded ammunition. Factors such as case material, head design, and neck dimensions can all affect aspects like case capacity, pressure, and overall cartridge performance.

By familiarizing yourself with the different pistol cartridge case types, you’ll be able to make informed decisions, select the appropriate cases for your specific needs, and ensure consistent and safe reloading outcomes.

Common Pistol Cartridge Case Types

Boxer Primed Cases

Boxer primed cases are the most widely used type of pistol cartridge case. These cases feature a centrally located primer pocket that is designed to accommodate a separate primer. Boxer primed cases are known for their reliability, ease of reloading, and popularity among reloaders.

Berdan Primed Cases

Berdan primed cases differ from Boxer primed cases in that they have two flash holes and a non-removable primer anvil. Berdan primed cases are less common in the United States but are more prevalent in certain international markets. Reloading Berdan primed cases requires specialized tools and can be more challenging compared to Boxer primed cases.

Rimmed Cases

Rimmed cases, such as the .38 Special and .357 Magnum, have a protruding rim at the base of the case. This rim helps the cartridge securely fit into the chamber and provides better extraction from the firearm. Rimmed cases are often associated with revolvers, but they can also be used in some semi-automatic pistols.

Rimless Cases

Rimless cases, like the 9mm Luger and .40 S&W, do not have a protruding rim. Instead, they have a slightly recessed rim or no rim at all. Rimless cases are typically used in semi-automatic pistols, as the absence of a rim allows for smoother feeding and extraction.

Belted Cases

Belted cases, exemplified by the .44 Magnum, feature a raised band or “belt” around the case just below the case mouth. This belt helps to provide better headspacing and alignment in the chamber, particularly in revolvers. Belted cases are less common in modern pistol cartridges.

Bottleneck Cases

Bottleneck cases, such as the .357 SIG and 10mm Auto, have a tapered case design that narrows towards the bullet end. This shape helps to improve powder burn efficiency and can also contribute to more reliable feeding in some semi-automatic pistols.

Properly Handling Pistol Cartridge Cases

Regardless of the specific case type, proper handling and maintenance are essential for ensuring safe and consistent reloading. This includes techniques like case cleaning, case lube application, and proper resizing to maintain correct headspace.

By understanding the nuances of each pistol cartridge case type and applying best practices in your reloading process, you’ll be able to produce high-quality, reliable ammunition that will keep your handgun performing at its best.

Remember, always refer to the manufacturer’s recommendations and reloading manuals for specific guidelines and safety considerations when reloading any type of pistol cartridge case.