Winchester USA .223 Remington 55gr FMJ Ammo, 1000-Round Case

The Winchester USA .223 Remington 55-grain FMJ case (part no. USA223LKY) is built for shooters who put serious volume through their AR-platform rifles without babysitting a small box count. Winchester loads this cartridge with a 55-grain full metal jacket bullet over brass cases, the same dependable training combination that has filled range bags for decades. It is chambered in .223 Remington/5.56 NATO, so it runs in the huge installed base of AR-15s and bolt guns built around that cartridge. Sold by the full 1,000-round case, this is ammunition built for range days, not just range trips, in rifle ammunition built to run.

Key Specifications

• The chambering is .223 Remington/5.56 NATO, matching the most common AR-platform rifles on the market.
• The bullet weighs 55 grains, a middleweight choice that balances flat trajectory with manageable recoil.
• The bullet is a full metal jacket design, feeding reliably without expanding.
• FMJ construction means no barrel leading, keeping practice sessions consistent round after round.
• Cases are brass, running smoothly through semi-auto actions and standing up to repeated extraction.
• Each case holds a full 1,000 rounds, enough for a full season of range trips without reordering.
• Cost runs about $0.39 a round, keeping high-volume training affordable.

Frequently Asked Questions

Will this ammo run reliably in an AR-15? Yes, the 55-grain FMJ load and brass case are built for smooth cycling through semi-automatic AR-platform rifles.

Is this compatible with 5.56 NATO chambers? Yes, the load covers both .223 Remington and 5.56 NATO chambering, so it runs in either.

What is a 1,000-round case best suited for? High-volume range days, training classes, or stocking up so you are not reordering every trip.

Buy the Winchester USA .223 Remington 55gr FMJ Ammo

Running a rifle hard at the range demands ammunition that keeps up without breaking the budget, and this case does exactly that. Load mags, post targets, and burn through rounds without watching the count. Order from our Lubbock, Texas gun shop and it ships fast to your door.