Winchester Ammo WB556MC55X Centerfire Rifle Reloading 5.56x45mm NATO .224 55 gr Full Metal Jacket Boat-Tail (FMJBT) 100 Per Box

If you're loading ammunition for your AR-15 or other rifle chambered in 5.56x45mm NATO, Winchester's 55-grain full metal jacket boat-tail bullets give you a proven, affordable option for target shooting and training. This 100-count box of reloading bullets combines a classic military bullet profile with the accuracy benefits of a boat-tail design—ideal for shooters who want consistent performance without breaking the bank on component costs.

The 55-grain weight is the standard mil-spec round for 5.56 NATO, so if you've fired factory ammo and liked how it performed, these bullets will reload to a familiar ballistic platform. The full metal jacket construction contains a lead core wrapped in copper, delivering reliable feeding and straightforward reloading without the complexity of hollow-points or specialty designs. The boat-tail geometry helps stabilize the bullet in flight and can improve accuracy at distance compared to flat-base alternatives.

Whether you're building training ammo for the range, stocking up for a long shooting session, or just looking to stretch your ammunition budget through handloading, these Winchester reloading bullets deliver quality you can count on. Each component meets Winchester's standards for consistency, so you can focus on your load data and technique rather than worrying about QC issues.

Key Features

• 55-grain weight — mil-spec standard for 5.56x45mm NATO
• Full metal jacket boat-tail design for reliable feeding and improved ballistics
• Lead core with copper jacket for proven, consistent performance
• 100 bullets per box — convenient for consistent reloading batches
• Engineered for AR-15s and other 5.56 NATO-chambered rifles

Specifications

Frequently Asked Questions

What rifles can I use these bullets in?

These .224-caliber, 55-grain bullets are designed for rifles chambered in 5.56x45mm NATO or .223 Remington. They work in AR-15s, bolt-action rifles, and other platforms that use this caliber.

Are these bullets suitable for hunting?

These are full metal jacket bullets, which are designed for target shooting and training rather than hunting. For hunting, consider bullets specifically designed for that purpose.

What's included in the box?

Each box contains 100 individual bullets ready for reloading into your 5.56x45mm NATO or .223 Remington cases.

Do I need special equipment to reload these bullets?

You'll need standard centerfire rifle reloading equipment: a press, dies, cases, primers, and powder. Load data specific to 55-grain boat-tail bullets in your caliber should be consulted before beginning.