Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The Winchester White Box USA 223 Remington 55 grain FMJ delivers range ammunition engineered for reliability, not gimmicks. At 3240 feet per second and 1282 foot-pounds of energy, this supersonic load maintains a flat trajectory through 200 yards while the full metal jacket bullet preserves barrel life and feeds without hiccup in semi-automatic platforms. Boxer-primed brass cases reload cleanly, and the non-corrosive formulation means you can burn through strings without rushing post-session cleaning. Winchester built the White Box line for shooters who measure value in rounds downrange, not marketing copy.
Built for the Box
Winchester loads this round with a 55 grain FMJ projectile—a cup-and-core design where a lead core sits inside a gilding metal jacket. The G1 ballistic coefficient of 0.255 isn’t match-grade, but it’s consistent enough for practical accuracy at carbine distances. The bullet exits at 3240 fps, stays supersonic past 500 yards, and punches paper without fragmenting or expanding. Brass cases carry boxer primers, not berdan, so you can deprime and resize without fighting crimped pockets. Winchester sources components domestically and assembles in the United States, keeping quality control in-house from powder to crimp.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 223 Remington |
| Bullet Weight | 55 Grains |
| Bullet Type | Full Metal Jacket |
| Muzzle Velocity | 3240 fps |
| Muzzle Energy | 1282 ft-lbs |
| Rounds/Box | 1000 (50 boxes of 20) |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| G1 Ballistic Coefficient | 0.255 |
| Velocity Rating | Supersonic |
| Intended Use | Range & Target |
| Manufacturer | Winchester |
This load ships as 50 individual 20-round boxes inside a sealed case, totaling 1000 rounds and 27.21 pounds. The packaging carries DOT hazmat classification, so freight timing depends on carrier routing. Browse the full Winchester 223 Ammo inventory for other grain weights and projectile styles.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Treat every firearm as loaded. Keep the muzzle pointed in a safe direction. Keep your finger off the trigger until ready to fire. Be certain of your target and what lies beyond it.
- Verify state and local laws governing ammunition purchase, possession, and use in your jurisdiction before ordering.
- This ammunition contains lead. Wash hands thoroughly after handling ammunition or cleaning firearms. Pregnant women and children should avoid exposure to lead dust and residue.
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