Ammo Reports Team
| Feature | Detail |
|---|---|
| Primary Use | Target shooting, range training |
| Bullet Type | Full Metal Jacket (FMJ) |
| Bullet Weight | 147 gr |
| Case Material | Brass |
| Primer Type | Boxer, centerfire |
| Packaging | 20 rounds per box |
| Typical Price | $18.49/box · $0.92/round |
| Closest Competitors | Hornady Black 300 BLK 147 gr FMJ-BT, Federal American Eagle 300 BLK 150 gr FMJ-BT, Magtech 300 BLK 147 gr FMJ |
Official Specs
| Spec | Value | Source |
|---|---|---|
| Muzzle Velocity (fps) | 1,920 | Product description |
| Muzzle Energy (ft-lbs) | 1,203 | Product description |
| Bullet Weight | 147 gr | Manufacturer |
| Bullet Type | Full Metal Jacket (FMJ) | Manufacturer |
| BC G1 | — | Not published |
| BC G7 | — | Not published |
| Manufacturer SKU | — | Not published |
| UPC | — | Not published |
| Reloadable | Yes | Brass case, Boxer primer |
Note on BC: Winchester does not publish ballistic coefficient data for this load in the USA white-box lineup. The ballistics table below uses a commonly referenced G1 BC estimate of 0.280 for a 147 gr .30-caliber FMJ projectile — treated as a calculated estimate, not a manufacturer figure.
Note on Energy Consistency: A 147 gr bullet at 1,920 fps produces approximately 1,203 ft-lbs of kinetic energy (½mv²). The figure stated in the product description is internally consistent and does not appear to reflect a common retailer data-swap error. No flag required.
Ballistics Table
Calculated estimate. Real-world results vary by barrel length, temperature, altitude, and lot. Community submissions will provide measured muzzle velocity for comparison.
Zeroed at 100 yards. Sight height: 1.5″ above bore. Assumes 1,920 fps muzzle velocity, G1 BC ≈ 0.280, standard conditions (59°F, sea level).
| Yards | Velocity (fps) | Energy (ft-lbs) | Trajectory (in) |
|---|---|---|---|
| 0 | 1,920 | 1,203 | -1.5 |
| 100 | 1,718 | 964 | 0.0 ← zero |
| 200 | 1,531 | 765 | -7.1 |
| 300 | 1,361 | 604 | -25.4 |
| 400 | 1,213 | 480 | -59.5 |
| 500 | 1,093 | 390 | -115.2 |
Key takeaway: The 300 Blackout cartridge was engineered around supersonic and subsonic performance in short-barreled rifles, and this 147 gr load stays firmly in supersonic territory throughout practical engagement distances. Energy drops below 500 ft-lbs by 500 yards, which reflects the caliber’s intended design envelope — this is a close- to mid-range cartridge. For most range training and target shooting applications, the 100–200 yard window is where this load performs most predictably. Shooters running 16-inch barrels may see slightly higher velocities than the listed figure; those using 9-inch pistol-length barrels should expect a meaningful reduction from the published spec.
Best Uses
Good fit:
- Plinking and high-volume range sessions where per-round cost matters
- Zeroing and andfunction-checking AR-platform rifles chambered in 300 BLK
- Training drills that mirror the weight and recoil impulse of heavier defensive loads
- Suppressor-host rifles where supersonic 147 gr provides a distinct performance tier from subsonic loads
- Confirming reliable cycling in gas-impingement and piston-driven 300 BLK builds
Not the right tool for:
- Hunting — FMJ projectiles are prohibited for deer and other big game in most U.S. states and are not designed for reliable terminal expansion
- Subsonic suppressor applications — at 1,920 fps this load is well above the sound barrier; users seeking hearing-safe unsuppressed performance need a dedicated subsonic load
- Long-range precision work — the 300 Blackout cartridge loses energy rapidly past 300 yards and was not designed for extended-range accuracy competition
- Jurisdictions with lead-core FMJ restrictions on public or wildlife-area ranges
Reliability Notes
No structured submissions yet.
Based on manufacturer claims and open-source information: Winchester’s USA white-box line is produced to consistent headspace and charge tolerances intended for semi-automatic platforms. The brass-cased, Boxer-primed construction supports reliable extraction across a range of chamber temperatures. No documented feeding or ejection issues specific to this load appear in available open-source records. Winchester states this ammunition is suited for semi-automatic rifles, which aligns with the cartridge’s primary platform. These notes reflect manufacturer claims and publicly available information — not independently verified structured data.
Competitors
| Load | Weight | Bullet | BC G1 | Muzzle Velocity | Price/box | Notes |
|---|---|---|---|---|---|---|
| Hornady Black 300 BLK 147 gr FMJ-BT | 147 gr | FMJ Boat Tail | ~0.295 | 1,940 fps | ~$22–$25 | Premium alternative; boat-tail profile may offer marginal BC advantage |
| Federal American Eagle 300 BLK 150 gr FMJ-BT | 150 gr | FMJ Boat Tail | ~0.292 | 1,900 fps | ~$20–$23 | Close weight match; brass case; widely available |
| Magtech 300 BLK 147 gr FMJ | 147 gr | FMJ | ~0.275 | 1,900 fps | ~$16–$19 | Budget alternative; brass case; similar velocity tier |
| Sellier & Bellot 300 BLK 147 gr FMJ | 147 gr | FMJ | ~0.275 | 1,886 fps | ~$17–$20 | European-sourced; brass case; consistent QC record |
| PMC Bronze 300 BLK 147 gr FMJ | 147 gr | FMJ | ~0.270 | 1,850 fps | ~$17–$20 | Budget tier; brass case; slightly lower velocity |
Price Reality
- Typical retail range: $17.99–$20.99 per 20-round box; case pricing (typically 500 rounds) often falls in the $420–$480 range when available
- Per-round cost at $18.49: approximately $0.92/round
- Compared to Hornady Black 147 gr, Winchester USA runs roughly $4–$6 less per box — a meaningful difference at volume
- Compared to Magtech 147 gr, Winchester USA is priced within $1–$2 per box, putting them in direct budget competition
- Fair benchmark: anything above $1.10/round for a standard brass-cased FMJ in 300 BLK represents a premium that is difficult to justify for range use at current market conditions
- Below $0.85/round would represent an exceptional deal worth stocking
Prices change. Check the Where to Buy block for current listings.
Where to Buy
Winchester USA 300 Blackout 147 Gr FMJ (Box)
Affiliate links. These do not influence ratings, data, or any editorial content on this page.
FAQ
Does the 147 gr FMJ bullet in this load cycle reliably in pistol-length 300 BLK barrels?
The 300 Blackout cartridge was specifically designed to cycle in short-barreled AR-15 platforms, including 9-inch barrels. At 1,920 fps from a rifle-length barrel, this load generates sufficient gas pressure for reliable semi-automatic cycling in properly tuned rifles. Pistol-length barrels will produce lower muzzle velocities — typically 100–200 fps less — but the cartridge’s design accommodates this. Shooters running non-standard gas port configurations or heavily suppressed setups should verify cycling with their specific host firearm.
How does this load compare to Winchester’s own 300 BLK subsonic offerings?
This 147 gr load is a supersonic load running at approximately 1,920 fps, placing it in an entirely different performance category than Winchester’s 200 gr or 220 gr subsonic options. The supersonic load produces a sonic crack when fired unsuppressed and delivers significantly more energy at distance. Subsonic loads are optimized for suppressed use and remain below 1,125 fps. Shooters who run both should verify their rifle’s gas system and suppressor setup are appropriate for each velocity tier, as some platforms require adjustment between the two.
Is this ammunition legal for deer hunting?
In virtually all U.S. states, FMJ bullets are prohibited for deer hunting due to regulations requiring expanding or controlled-expansion projectiles. This load is not designed for hunting and should not be used for that purpose regardless of local regulations. Hunters seeking a 300 Blackout deer load should look to purpose-built expanding options such as soft-point or polymer-tipped hunting bullets in appropriate weights. This Winchester USA load is explicitly a target and training product.
Can the brass cases from this load be reloaded?
Yes. The brass case and Boxer primer construction makes this ammunition fully compatible with standard reloading equipment. Winchester brass has a strong reputation for dimensional consistency and case life. However, this page covers factory ammunition only — reloading data, charge weights, and handload recipes are outside the scope of this reference. Consult a current reloading manual from a reputable source for load development information.
Why does 300 Blackout use a 147 gr bullet — the same weight as 9mm FMJ?
The coincidence in bullet weight reflects different engineering goals. The 147 gr 9mm bullet is a pistol projectile measuring .355 inches in diameter optimized for low-velocity subsonic performance. The 147 gr 300 BLK bullet is a .308-inch-diameter rifle projectile running at supersonic velocities and designed for a rifle-length cartridge case. The shared weight is a numerical coincidence — the two rounds are dimensionally, ballistically, and terminally unrelated. The 300 Blackout was designed to maximize performance from short-barreled rifles while sharing the AR-15 bolt and magazine, not to mirror pistol cartridge weights.
