CCI Small Rifle Primers #400 are a type of primer used in reloading small rifle cartridges. These primers are known for their consistent ignition and reliability, making them popular among handloaders. They are specifically designed for small rifle cartridges, offering consistent performance in various conditions.Some key features of CCI #400 Small Rifle Primers include:

• Reliable ignition: CCI primers are known for being reliable, even in cold conditions or when using slower powders.
• Cleaner burning: They generate less residue, helping to keep the action cleaner for longer.
• Sensitive yet safe: These primers are designed to be sensitive enough to ensure a proper ignition, while also maintaining safety during handling.

They are commonly used in calibers like .223 Remington, making them a go-to choice for reloading enthusiasts.