CCI Large Pistol Primers #300

CCI Primers are continuously tested and improved. As a result today’s CCI primers are more sensitive, easier to seat and more compatible with progressive and automated loading equipment than ever before. They utilize modern non-corrosive and non-mercuric initiator mixes for the cleanest burn possible. Available in 1000 or 5000 count boxes.

Shop CCI Large Pistol Primers #300 for clean-burning, consistent ignition in .45 ACP, 10mm, .40 S&W and other large-pistol cartridges. Trusted by reloaders for smooth seating and repeatable performance.

Reliable Ignition for All Your Handgun Needs

When consistency matters, CCI Large Pistol Primers #300 deliver the clean, dependable spark reloaders expect. Engineered for standard large-pistol cartridges, these primers provide uniform ignition energy that helps produce repeatable pressures and tight velocity spreads. Whether you’re loading practice rounds, competition ammo, or defensive cartridges, CCI #300 gives you the kind of predictable performance that builds confidence shot after shot.

Ideal Applications From Range Practice to Duty Loads

Perfectly suited for a wide range of calibers, CCI #300 is a go-to for shooters loading .45 ACP, .40 S&W, 10mm Auto, .44 Special, and many other large-pistol cartridges. They’re equally at home in light target recipes and stout defensive or duty loads. If you need one primer that handles everyday practice as well as serious carry or service loads, #300 is designed to meet that need reliably.

Precision Manufacturing = Consistent Ballistics

CCI’s manufacturing standards emphasize uniform cup thickness, precise anvil placement, and consistent priming compound distribution. The result is primers that seat smoothly, ignite cleanly, and produce minimal shot-to-shot variation. That manufacturing discipline translates directly to tighter groups and more predictable ballistic performance the small components that make a big difference on the range or in the field.

Clean-Burning & Shooter-Friendly

The priming compound used in CCI #300 is non-corrosive and clean-burning, which reduces residue in the firing chamber and helps protect barrel life. Cleaner ignition improves semi-auto cycling and reduces maintenance time after long shooting sessions. For reloaders who value smooth operation and less fouling, these primers make maintaining peak performance easier.

Handling, Seating & Safety Tips

• Seat primers squarely and to recommended depths with a quality primer tool.

• Store primers in a cool, dry place away from direct heat and open flames.

• Always follow published load data and start at recommended starting charges when developing loads.

• Use appropriate PPE and safe reloading practices primers are energetic components and should be handled carefully.