Introduction to Depriming
"Depriming" refers to the process of removing the spent primer from a used cartridge case. The primer is a small charge that ignites the gunpowder in the cartridge. Once a cartridge has been fired, the spent primer must be removed and replaced during the reloading process. The following describes depriming with a reloading press. See my other article for information on using a hand-depriming tool.
Here's a basic guide to depriming a cartridge case:
- Safety First: Always make sure you're wearing proper safety gear, including eye protection. Make sure you're in a well-ventilated area and that there are no sources of open flame or sparks near your workspace. Also, always double-check that the cartridge has been fired and is empty before you begin the depriming process.
- Preparation: Gather all necessary materials. This will typically include a reloading press, a de-priming die (also called a decapping die), and a shell holder that fits your specific cartridge case.
- Setting Up: Install the shell holder into the reloading press. Next, insert the depriming die according to your press's instructions. The exact method will depend on your specific model of press, but generally, you will screw the die into the top of the press.
- De-Priming: Insert the used cartridge case into the shell holder. Most reloading presses operate with a lever system: you'll pull the lever to raise the cartridge case into the de-priming die. As the case enters the die, a pin will push out the spent primer.
- Disposal: Safely dispose of the spent primer.
- Inspection: Finally, inspect the primer pocket (the hole where the primer was) to make sure it's clean and free of any debris. Some reloaders will also use a special cleaning tool to clean the primer pocket.
After depriming, you can proceed with the rest of the reloading process, including cleaning the case, re-priming it, and adding the new gunpowder and bullet.
Always follow safety instructions and guidelines when reloading ammunition. Missteps can lead to dangerous situations. If you're new to reloading, consider seeking out a course or an experienced mentor to guide you through the process.
Find depriming tools here.
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