Winchester White Box, 5.56x45mm NATO, FMJ, 55 Grain
Ammo Reports Team
| Feature | Detail |
|---|---|
| Primary Use | Target practice, training, and plinking |
| Bullet Type | 55-grain full metal jacket (FMJ) |
| Case | Brass (short-action) |
| Primer | Boxer (Small Rifle Primer) |
| Packaging | 20 rounds per box |
| Typical Price | $11.39/20-round box – approximately $0.57/round |
| Closest Competitors | Fiocchi Range Dynamics 5.56 NATO 55 Grain FMJBT; Norma Range & Training 5.56 NATO 55 Grain FMJ; Wolf Gold 5.56 NATO 55 Grain FMJ |
Official Specs
| Spec | Value | Source |
|---|---|---|
| Muzzle Velocity (fps) | – | Winchester currently states that ballistic data is unavailable for this product |
| Muzzle Energy (ft-lbs) | – | Not published by Winchester for this exact product |
| Bullet Weight | 55 gr | Winchester official product data |
| Bullet Type | Full Metal Jacket (FMJ) | Winchester official product data |
| BC G1 | – | Not found in verified official manufacturer sources |
| BC G7 | – | Not found in verified official manufacturer sources |
| Manufacturer SKU | Q3131 | Winchester official product page; Q3131L appears in the connected product feed |
| UPC | 020892201880 | Verified exact product identification |
| Case Material | Brass (short-action) | Factory-load construction |
| Primer | Boxer (Small Rifle Primer) | Factory-load construction |
| Reloadable | Yes | Brass case with Boxer primer |
| Package Quantity | 20 rounds | Winchester official product data |
Verification note: UPC 020892201880 identifies the 20-round Winchester USA White Box 5.56 NATO 55 Grain FMJ product. Winchester lists the product as Q3131, while the connected merchant feed uses Q3131L for the same UPC.
Ballistics Table
Winchester’s official product page states that ballistic data is not available for this exact load. The previous table used assumed muzzle velocity and BC values, so it has been removed rather than presented as factory data.
| Range (yd) | Velocity (fps) | Energy (ft-lbs) | Trajectory (in) | 10 mph Wind Drift (in) |
|---|---|---|---|---|
| 0 | – | – | – | – |
| 100 | – | – | – | – |
| 200 | – | – | – | – |
| 300 | – | – | – | – |
| 400 | – | – | – | – |
| 500 | – | – | – | – |
| 600 | – | – | – | – |
| 700 | – | – | – | – |
Conditions: Test barrel, zero distance, sight height, atmospheric conditions, and wind convention were not published for a verified factory table. Empty cells are intentional.
Best Uses
Good fit:
- High-volume range sessions where per-round cost matters
- Function testing and break-in for new 5.56x45mm rifles and AR-15 platforms
- Carbine training drills at distances of 25–200 yards
- Shooters building familiarity with 5.56 NATO pressure and recoil characteristics before transitioning to specialty loads
- Bulk stockpiling for preparedness or sustained practice programs
Not the right tool for:
- Hunting — FMJ projectiles are illegal for deer and most game hunting in the majority of U.S. states
- Precision long-range shooting beyond 300 yards where BC and consistency matter
- Defensive or home protection use — FMJ over-penetration is a documented concern in populated environments
- Suppressed fire where subsonic or low-flash loads are preferred
- Rifles chambered strictly in .223 Remington without confirming the chamber can safely handle 5.56 NATO pressure — always verify with your manufacturer
Reliability Notes
No standardized manufacturer reliability test results were found for exact UPC 020892201880 across multiple firearms. Confirm feeding, extraction, ignition, and point of impact in the specific 5.56 NATO firearm and magazines used for training.
Competitors
- Fiocchi Range Dynamics 5.56 NATO 55 Grain FMJBT – a published 50-round alternative with official factory ballistics.
- Norma Range & Training 5.56 NATO 55 Grain FMJ – a published 250-round bulk-pack alternative.
- Wolf Gold 5.56 NATO 55 Grain FMJ – a brass-cased M193-style option.
- PMC X-Tac 5.56 NATO 55 Grain FMJ-BT – another published 55-grain training load.
Price Reality
- Typical retail range: $10.00–$13.50 per 20-round box depending on market conditions; case pricing (1,000 rounds) typically falls in the $500–$650 range when available
- Per-round cost: At $11.39 per box, this works out to $0.57 per round
- vs. PMC Bronze: PMC frequently undercuts this load by $0.05–$0.10 per round with comparable specs and published velocity data
- vs. Federal American Eagle: Federal AE is priced similarly ($0.57–$0.62/round) but publishes full ballistic specs, giving buyers more data for the same money
- vs. Black Hills 77gr OTM: Black Hills runs $1.00–$1.20/round — nearly double — but is a purpose-built precision load, not a fair comparison for training use
- Fair price benchmark: At current market rates, $0.55–$0.65 per round is a reasonable expectation for brass-cased 5.56 NATO FMJ in a 20-round box. Paying above $0.70/round for this configuration should prompt a comparison check. Steel-case alternatives can be found for $0.35–$0.45/round if reloadability is not a priority.
Prices change. Check the Where to Buy block for current listings.
Where to Buy
Winchester White Box, 5.56x45mm NATO, FMJ, 55 Grain, 20 Rounds
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What is the exact product identification?
This 20-round Winchester White Box load is identified by UPC 020892201880. Winchester lists it as Q3131, while the connected merchant feed uses Q3131L.
Does Winchester publish ballistics for this product?
No. Winchester’s official product page currently states that ballistic data is unavailable for this exact load.
What is the intended use?
The 55-grain FMJ load is intended primarily for target practice, training, and plinking.
Can this ammunition be fired in a 223 Remington-only chamber?
Use 5.56 NATO ammunition only in a firearm whose manufacturer marks or approves the chamber for 5.56 NATO or another compatible designation.
Is the case reloadable?
The load uses a brass case and Boxer primer, so the case is generally reloadable if it remains safe and within dimensional limits.
