Ammo Reports Team
| Feature | Detail |
|---|---|
| Primary Use | Training, competition, recreational shooting |
| Bullet Type | Full Metal Jacket (FMJ) |
| Bullet Weight | 125 grain |
| Case Material | Brass |
| Primer Type | Boxer |
| Packaging | 150 rounds per box |
| Typical Price | $153.49/box · $1.02/round |
| Closest Competitors | Magtech 300 Blackout 123 gr FMJ, Federal American Eagle 300 Blackout 150 gr FMJ OTM, Winchester USA 300 Blackout 147 gr FMJ |
Official Specs
| Spec | Value | Source |
|---|---|---|
| Muzzle Velocity (fps) | — | Not published |
| Muzzle Energy (ft-lbs) | — | Not published |
| Bullet Weight | 125 gr | Manufacturer |
| Bullet Type | Full Metal Jacket | Manufacturer |
| BC G1 | — | Not published |
| BC G7 | — | Not published |
| Manufacturer SKU | — | Not published |
| UPC | — | Not published |
| Reloadable | Yes | Manufacturer (Boxer-primed brass) |
Note: Hornady’s Frontier line does not consistently publish muzzle velocity or muzzle energy for every SKU through standard retail channels. The 300 Blackout cartridge is particularly sensitive to barrel length — supersonic performance from a 16″ barrel differs substantially from a 9″ barrel — which may explain why Hornady declines to state a single advertised velocity figure for this load. The ballistics table below uses a calculated estimate based on published industry data for comparable 125 gr FMJ 300 Blackout supersonic loads. All calculated values are labeled accordingly.
Ballistics Table
Calculated estimate. Real-world results vary by barrel length, temperature,altitude, and lot. Community submissions will provide measured muzzlevelocity for comparison. Values below assume a 16″ barrel, standardatmospheric conditions (59°F, sea level), and a 1.5″ sight height above bore.A BC G1 of approximately 0.280 is assumed based on comparable 125 gr FMJprojectiles in this caliber.
| Yards | Velocity (fps) | Energy (ft-lbs) | Trajectory (in) |
|---|---|---|---|
| 0 | ~2175 | ~1313 | -1.5 |
| 100 | ~1938 | ~1043 | 0.0 ← zero |
| 200 | ~1718 | ~819 | -7.4 |
| 300 | ~1518 | ~640 | -27.1 |
| 400 | ~1342 | ~500 | -64.5 |
| 500 | ~1196 | ~397 | ~-125.0 |
Key takeaway: At supersonic velocities out of a standard-length barrel, the Hornady Frontier 125 gr FMJ delivers adequate energy for target work well past 200 yards, but trajectory drop becomes significant beyond that point. For most practical uses — range training, competition stages, and general recreational shooting — the 0–200 yard window is where this load performs most predictably. Shooters using shorter pistol-length or SBR barrels should expect meaningfully lower muzzle velocities and correspondingly reduced downrange energy. The 300 Blackout cartridge’s supersonic/subsonic duality means barrel length matters more here than in nearly any other common rifle caliber.
The Frontier Cartridge Line and Its Relationship to Hornady
Frontier Cartridge is a Hornady-affiliated brand that uses Hornady-manufactured projectiles loaded into brass cases at a separate facility. This arrangement allows the Frontier label to offer Hornady bullet quality at a price point positioned below Hornady’s premium lines such as BLACK or Precision Hunter. The FMJ projectile in this load is the same style of full metal jacket bullet Hornady supplies to military and law enforcement training contracts, giving it a credible pedigree for high-volume shooting applications. Buyers sometimes encounter confusion about whether Frontier is “real” Hornady ammunition — the short answer is that the bullets are genuine Hornady components, while the loaded cartridge is produced under a separate brand umbrella. This distinction is worth understanding when comparing this product to Hornady’s own 300 Blackout BLACK line, which uses different projectile designs optimized for terminal performance rather than training economy.
Best Uses
Good fit:
- High-volume range training where per-round cost matters
- Competition shooting that requires supersonic 300 Blackout loads
- Carbine and rifle qualification courses
- Recreational plinking where consistent feeding and extraction are priorities
- Shooters building round-count data on a new AR-platform 300 Blackout build
- Bulk purchase for training stockpiles due to the 150-round box format
Not the right tool for:
- Hunting — FMJ projectiles are prohibited or ethically inappropriate for deer and larger game in most jurisdictions
- Subsonic suppressed shooting — this is a supersonic load and will not cycle quietly through a suppressor
- Self-defense or home protection — FMJ offers no controlled expansion
- Shooters running short barrels who need confirmed supersonic performance — velocity data is unpublished and results will vary
Reliability Notes
No structured submissions yet.
Based on manufacturer claims and open-source user reports, the Frontier Cartridge line is noted for consistent primer seating and uniform case dimensions, which contribute to reliable feeding in AR-15 and AR-pattern 300 Blackout rifles. The brass case construction is reported to extract cleanly across a range of gas system configurations. Open-source forum discussions suggest this load functions reliably in both carbine-length and pistol-length gas systems, though — as with all 300 Blackout ammunition — proper gas port sizing for the specific barrel remains the shooter’s responsibility. No pattern of failure-to-feed or failure-to-extract complaints specific to this SKU was identified in publicly available sources at the time of writing. All notes here come from manufacturer claims or open sources, not structured submission data.
Competitors
| Load | Weight | Bullet | BC G1 | Adv. Velocity | Price/box | Notes |
|---|---|---|---|---|---|---|
| Magtech 300 Blackout 123 gr FMJ | 123 gr | FMJ | ~0.270 | 2230 fps | ~$65–$80 (50 rd) | Budget alternative; widely available |
| Federal American Eagle 300 BLK 150 gr FMJ OTM | 150 gr | FMJ/OTM | ~0.295 | 1900 fps | ~$55–$75 (50 rd) | Heavier bullet; subsonic-adjacent velocity |
| Winchester USA 300 Blackout 147 gr FMJ | 147 gr | FMJ | ~0.290 | 1925 fps | ~$50–$70 (50 rd) | Budget-tier; common retail availability |
| Hornady BLACK 300 BLK 110 gr V-MAX | 110 gr | V-MAX | ~0.310 | 2350 fps | ~$30–$40 (20 rd) | Premium Hornady line; different use case |
| PMC Bronze 300 Blackout 147 gr FMJ | 147 gr | FMJ | ~0.285 | 1950 fps | ~$45–$65 (50 rd) | Budget alternative; steel-friendly range load |
| Sellier & Bellot 300 Blackout 124 gr FMJ | 124 gr | FMJ | ~0.272 | 2182 fps | ~$50–$70 (50 rd) | Closest weight match; European-manufactured |
Price Reality
- At $153.49 per box of 150 rounds, this load comes to approximately $1.02 per round
- On a per-round basis, that positions it competitively against buying multiple 20- or 50-round boxes of comparable 300 Blackout FMJ training ammunition
- Magtech and PMC Bronze 50-round boxes typically run $0.90–$1.30 per round depending on market conditions, making Frontier’s bulk pricing broadly competitive
- Winchester USA and Federal American Eagle 300 Blackout FMJ loads often appear in the $1.00–$1.40/round range at standard retail quantities
- A fair price benchmark for this load is $0.95–$1.10 per round; paying above $1.20/round for this SKU in a normal market would indicate a supply constraint or premium retail markup
- Case pricing (multiple boxes) is not consistently published for this SKU; buyers purchasing in larger quantities should seek case-lot pricing when available
Prices change. Check the Where to Buy block for current listings.
Where to Buy
Hornady Frontier 300 Blackout 125 Grain FMJ (Box)
Affiliate links. These do not influence ratings, data, or any editorial content on this page.
FAQ
Is the Hornady Frontier 125 gr FMJ a supersonic load?
Yes — the 125 grain projectile weight places this firmly in supersonic 300 Blackout territory. Supersonic 300 Blackout loads typically leave the muzzle above 2,000 fps from a 16″ barrel, well above the speed of sound threshold of approximately 1,125 fps. If you are running a suppressor and want hearing-safe performance without hearing protection, this is not the load to choose — you would need a dedicated subsonic 300 Blackout load in the 190–220 grain range. This load is optimized for standard unsuppressed or suppressor-present-but-still-supersonic use cases.
How does Frontier Cartridge relate to Hornady, and does that affect quality?
Frontier Cartridge loads Hornady-manufactured FMJ bullets into brass cases under a separate brand label. The projectile quality is consistent with Hornady’s manufacturing standards, which supply military training contracts. The primary difference from Hornady’s own branded lines is the absence of some premium case preparation steps and the use of a more economical overall production model. For training and recreational shooting, this distinction is largely irrelevant — the FMJ projectile will perform as expected for punching paper and running drills.
Can this ammunition be used for deer hunting?
No. Full metal jacket projectiles are prohibited for deer hunting in virtually every U.S. state, and for good reason — FMJ bullets do not expand on impact, meaning they do not reliably transfer energy or create the wound channel necessary for ethical, humane harvesting. For 300 Blackout hunting applications, loads using expanding projectiles such as soft points, polymer-tip designs, or bonded hunting bullets are the appropriate choice. This load is strictly a training and recreational round.
Does the 150-round box format offer a meaningful cost advantage?
The 150-round box is a relatively uncommon packaging format in the 300 Blackout market, where 20- and 50-round boxes dominate retail. Buying in this format reduces the per-round cost compared to purchasing three separate 50-round boxes of equivalent ammunition, assuming pricing is proportional. The practical advantage is fewer interruptions during range sessions and simplified inventory tracking for high-volume shooters. The trade-off is a higher single-transaction cost, which may be a consideration for budget-conscious buyers who prefer smaller purchases.
Will this load function reliably in a short-barreled 300 Blackout pistol or SBR?
300 Blackout was specifically designed to function in AR-platform rifles with barrels as short as 9 inches, and supersonic FMJ loads generally cycle reliably across a range of barrel lengths when the gas system is properly tuned. However, because Hornady Frontier does not publish a muzzle velocity for this load, there is no manufacturer-confirmed data on minimum barrel length for reliable cycling. Shooters running pistol-length builds should confirm function through live-fire testing and verify that their gas system and buffer weight are appropriate for their specific configuration before relying on any ammunition for consistent operation.
