The Winchester USA White Box .223 Remington 55‑grain full metal jacket load is a centerfire rifle cartridge intended for target shooting and training. This load features a 55‑grain FMJ bullet seated in reloadable, non‑corrosive brass designed for reliable feeding and consistent function. The cartridge is supplied in retail boxes and is commonly ordered in case quantities for extended range sessions. Manufacturer data lists a muzzle velocity of 3240 fps and muzzle energy of 1282 ft·lbs.
Packaging
Box: Sold per box containing 20 rounds. Case: Sold as a case quantity equivalent to 50 boxes (1,000 rounds) by ordering the required number of boxes to achieve the case quantity.
Key Specifications
- Caliber: .223 REM/5.56 NATO.
- Bullet weight: 55 grains.
- Bullet type: Full metal jacket (FMJ).
- Rounds per box: 20.
- Boxes per case: 50.
- Rounds per case: 1,000.
- Casing material: Brass (non‑corrosive).
- Muzzle velocity: 3240 fps.
- Muzzle energy: 1282 ft·lbs.
- Intended use: Target shooting and training.
Winchester USA White Box .223 Rem 55 gr FMJ is a straightforward, range‑oriented cartridge that prioritizes consistent performance and value for extended training sessions. Its reloadable brass, dependable FMJ bullets, and standard box/case packaging make it a practical choice for shooters focused on accuracy, reliability, and economical practice.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




