Description

Buy CCI Small Rifle Primers #400

CCI Small Rifle Primers #400, are in stock now at Primers Reloading. These are one of the most widely trusted primers among rifle reloaders, offering clean, consistent ignition for standard small rifle loads like .223 Remington and 5.56 NATO.

What is the CCI #400 primer?

The #400 is CCI’s standard (non-magnum) small rifle primer. It’s built with a slightly thicker primer cup than some competing brands, which many reloaders find helps prevent misfires or ruptured primers, especially in semi-automatic rifles that can hit primers with more force than a bolt-action. Despite the thicker cup, sensitivity isn’t sacrificed, so ignition stays reliable shot after shot.

Key features

• Consistent, reliable ignition – Engineered to reduce misfires and produce uniform ignition across a wide variety of powders.
• Larger “sweet spot” – Designed to fire reliably even when the firing pin doesn’t strike dead-center.
• Clean-burning compound – Uses modern, non-corrosive, non-mercuric initiator mixes.
• Easy to seat – Works well with progressive and automated loading equipment, and redesigned metal parts help reduce seating force.

Which cartridges use this primer?

The CCI #400 is a go-to choice for many popular small rifle cartridges, including:

• .223 Remington
• 5.56 NATO
• .222 Remington
• .17 Remington
• .204 Ruger

Always confirm with your reloading manual or load data that your cartridge calls for a standard (not magnum) small rifle primer before ordering.

Available quantities

• 100 count – A smaller amount, good for trying it out or topping off your bench.
• 1,000 count (box, 10 trays of 100) – The standard bulk option most reloaders choose.
• 5,000 count (case) – Best value for high-volume reloaders.

Why buy CCI #400 primers from Primers Reloading

• Trusted by hunters, target shooters, and competitors – A widely respected standard among rifle reloaders.
• In stock and ready to ship – No long waits or backorders.
• Right quantity for your needs – From single boxes to full cases.

Shipping information

Like all primers, the #400 is classified as a hazardous material for shipping:

• Ground shipping only — never by air.
• Shipped separately from non-hazmat items in most cases.
• Requires an adult signature (21+) upon delivery.
• Some states and localities may have additional shipping restrictions.

We handle the compliance details on our end — just place your order and be ready to sign for it.

Frequently Asked Questions

What calibers is the CCI #400 primer used for?
It’s commonly used in .223 Remington, 5.56 NATO, .222 Remington, and other small rifle cartridges that call for a standard (non-magnum) primer.

Is the CCI #400 a magnum primer?
No. The #400 is CCI’s standard small rifle primer. CCI’s magnum version for small rifle cartridges is the #450.

Is the thicker primer cup a safety concern?
No. The thicker cup is designed to help resist misfires and ruptures, particularly in semi-automatic rifles, without reducing sensitivity or reliability.

What quantities are available?
The CCI #400 is sold in 100-count boxes, 1,000-count boxes, and 5,000-count cases.

Can this primer be shipped to my state?
Most states allow direct shipping, but some states and cities have additional restrictions. Check our shipping policy or contact us before ordering if you’re unsure.

Is this a good primer for high-volume reloading?
Yes. It’s designed to be easy to seat and work well with progressive and automated reloading equipment, making it a popular choice among high-volume reloaders.