Where is the primer located in rimfire ammunition?

Where is the primer located in rimfire ammunition?

• A. In the rim of the casing
• B. In the center of the casing
• C. In the stock
• D. Under the barrel

Answer: (A)

In rimfire ammunition, the priming compound is located in the rim—the outer edge of the base of the cartridge. When the firing pin strikes that rim, it ignites the primer, which then lights the powder charge. This is different from centerfire ammunition, where the primer sits in a small cup in the center of the base. The other locations mentioned (in the stock or under the barrel) are parts of the firearm, not the ammunition, so they don’t describe where the primer is stored.

In rimfire ammunition, the priming compound is located in the rim—the outer edge of the base of the cartridge. When the firing pin strikes that rim, it ignites the primer, which then lights the powder charge. This is different from centerfire ammunition, where the primer sits in a small cup in the center of the base. The other locations mentioned (in the stock or under the barrel) are parts of the firearm, not the ammunition, so they don’t describe where the primer is stored.