Ammo Reports Team
| Feature | Detail |
|---|---|
| Primary Use | Target shooting, range training, varmint hunting |
| Bullet Type | Full Metal Jacket (FMJ), lead-core, copper-jacketed |
| Bullet Weight | 125 gr |
| Case Material | Brass |
| Primer Type | Boxer (reloadable) |
| Packaging | 20 rounds per box |
| Typical Price | $29.99/box — $1.50/round |
| Closest Competitors | Remington UMC 300 Blackout 220 gr OT, Winchester USA 300 Blackout 125 gr FMJ, Magtech 300 Blackout 123 gr FMJ |
Official Specs
| Spec | Value | Source |
|---|---|---|
| Muzzle Velocity (fps) | — | Not published by Hornady for this load |
| Muzzle Energy (ft-lbs) | — | Not published |
| Bullet Weight | 125 gr | Manufacturer |
| Bullet Type | Full Metal Jacket (FMJ) | Manufacturer |
| BC G1 | — | Not published |
| BC G7 | — | Not published |
| Manufacturer SKU | FR300B2 | Manufacturer / retailer listings |
| UPC | — | Not confirmed |
| Reloadable | Yes | Manufacturer (brass case, Boxer primer) |
Note: Hornady does not publish muzzle velocity or muzzle energy for the Frontier 300 Blackout 125 gr FMJ on their product page. This is an uncommon omission for a centerfire rifle load and may reflect the load’s multi-platform positioning — 300 Blackout is routinely fired from barrels ranging from 9″ pistol-length builds to 16″ carbines, producing widely divergent velocity figures. No third-party lab data was available at time of publication. The ballistics table below uses an estimated muzzle velocity derived from industry-standard published data for comparable 125 gr FMJ loads in this caliber from a 16″ barrel.
Ballistics Table
Calculated estimate. Real-world results vary by barrel length, temperature,altitude, and lot. Community submissions will provide measured muzzlevelocity for comparison. Estimate based on ~2,175 fps at muzzle from a 16″ barrel — a commonly reported figure for 125 gr supersonic 300 Blackout FMJ loads. Results from shorter barrels (9″–10.5″ SBR configurations) will be meaningfully lower.
Sight height: 1.5″ above bore. Zero: 100 yards.
| Yards | ~Velocity (fps) | ~Energy (ft-lbs) | ~Trajectory (in) |
|---|---|---|---|
| 0 | ~2,175 | ~1,313 | -1.5 |
| 100 | ~1,940 | ~1,044 | 0.0 ← zero |
| 200 | ~1,720 | ~821 | -7.2 |
| 300 | ~1,520 | ~642 | -26.5 |
| 400 | ~1,345 | ~502 | -64.0 |
| 500 | ~1,200 | ~400 | -126.0 |
Key takeaway: The 125 gr FMJ at supersonic velocities retains adequate energy for close-range varmint work and comfortable target shooting out to 200–250 yards from a standard carbine. Beyond 300 yards, trajectory drop becomes significant and wind drift compounds quickly given the modest ballistic coefficient typical of FMJ projectiles. This load is well-suited to the practical engagement distances most 300 Blackout shooters actually use — inside 200 yards. Buyers using suppressed short-barrel rifles should expect noticeably lower velocity figures than shown here.
The Frontier Cartridge Line
Hornady Frontier Cartridge occupies a specific niche in the Hornady catalog: it is positioned as American-made, military-specification ammunition built for high-volume training and general-purpose use rather than precision competition. The line uses Hornady projectiles loaded into brass cases with Boxer primers, which distinguishes it from steel-case economy options while keeping pricing below Hornady’s Black or Match tiers.
The 125 gr FMJ selection for 300 Blackout is deliberate. This weight sits squarely in supersonic territory, making it compatible with standard AR-15 bolt carriers and carbine-length gas systems without the tuning considerations that 220 gr subsonic loads sometimes require. For shooters who want a single training load that cycles reliably across a broad range of 300 Blackout platforms — including both 16″ carbines and 10.5″ SBR builds — a mid-weight supersonic FMJ is a practical default choice.
Best Uses
Good fit:
- High-volume range training where brass recovery for future reloading is valued
- Varmint hunting at distances inside 150 yards where terminal performance of FMJ is acceptable under local regulations
- Function testing and break-in of new 300 Blackout uppers and suppressors
- Shooters running suppressed carbines who need a supersonic cycling load to complement a subsonic hunting or defense load
- Mixed-platform households where one load needs to cycle reliably across multiple barrel lengths
Not the right tool for:
- Medium or large game hunting — FMJ construction is ethically and legally unsuitable for deer-sized animals in most jurisdictions
- Long-range precision work beyond 300 yards where trajectory and wind drift require a higher-BC projectile
- Subsonic suppressor use — at 125 gr this load is supersonic and will produce a supersonic crack even when suppressed
- Jurisdictions or ranges that prohibit FMJ or require frangible or soft-point ammunition
Reliability Notes
No structured submissions yet.
Based on manufacturer claims and open-source user reports, the following observations are noted — these come from manufacturer descriptions and open-source community data, not structured AmmoReports submissions:
- Hornady states the Frontier line is built to military-specification standards, implying consistent primer seating depth, powder charge uniformity, and case dimensions suitable for semi-automatic platforms.
- Brass cases are reported to be reloadable and consistent in wall thickness, which is relevant for shooters who recover and resize brass.
- The 300 Blackout chambering is sensitive to bullet setback in magazine-fed platforms; no specific reports of setback issues with this load were found in open sources at time of publication.
- Multiple open-source forum discussions note that Frontier 300 Blackout 125 gr loads cycle reliably in both pistol-length and carbine-length gas systems, though this has not been verified through structured testing.
Competitors
| Load | Weight | Bullet | BC G1 | Adv. Velocity | Price/box | Notes |
|---|---|---|---|---|---|---|
| Winchester USA 300 BLK 125 gr FMJ | 125 gr | FMJ | ~0.295 | ~2,165 fps | ~$26–$30 | Direct budget competitor; same weight class |
| Magtech 300 Blackout 123 gr FMJ | 123 gr | FMJ | ~0.290 | ~2,185 fps | ~$24–$28 | Budget alternative; steel-free brass |
| Hornady Black 300 BLK 110 gr V-MAX | 110 gr | V-MAX polymer tip | ~0.289 | ~2,350 fps | ~$32–$38 | Premium Hornady option; better terminal performance |
| Federal American Eagle 300 BLK 150 gr FMJ | 150 gr | FMJ-BT | ~0.340 | ~1,900 fps | ~$28–$33 | Heavier FMJ; slower but slightly better BC |
| Sig Sauer Elite 300 BLK 125 gr FMJ | 125 gr | FMJ | ~0.295 | ~2,014 fps | ~$30–$35 | Same weight; competing military-grade claim |
| Remington UMC 300 BLK 220 gr OT | 220 gr | Open Tip (subsonic) | ~0.285 | ~1,010 fps | ~$28–$35 | Different use case — subsonic/suppressor load |
Note: BC values for competing FMJ loads above are industry estimates based on comparable projectile geometry and are not manufacturer-published figures. Velocity figures are manufacturer-stated where available. The Remington UMC 220 gr OT is included as a reference point for buyers deciding between supersonic and subsonic 300 Blackout configurations — it is not a direct substitute for this load.
Price Reality
- Typical retail range: $27.99–$32.99 per 20-round box; case pricing (typically 500 rounds / 25 boxes) is not consistently listed by Hornady for this SKU but has been observed around $320–$360 when available
- Per-round cost: approximately $1.40–$1.65 at typical retail; the $29.99 reference price works out to $1.50/round
- vs. Winchester USA 300 BLK 125 gr FMJ: Winchester typically runs $1.30–$1.50/round — similar or slightly cheaper for comparable FMJ performance
- vs. Hornady Black 300 BLK 110 gr V-MAX: Hornady Black runs approximately $1.60–$1.90/round, representing a meaningful premium for improved terminal performance
- vs. Magtech 300 BLK 123 gr FMJ: Magtech is typically the budget floor at $1.20–$1.40/round for comparable FMJ construction
- Fair price benchmark: At $1.50/round this load is priced in the middle of the 300 Blackout FMJ market. Paying above $1.75/round for this specific load would represent an overpriced purchase given available alternatives. At or below $1.40/round it represents solid value for brass-cased, American-made FMJ ammunition.
Prices change. Check the Where to Buy block for current listings.
Where to Buy
Hornady Frontier 300 Blackout 125 Gr FMJ (Box)
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FAQ
Does the Hornady Frontier 125 gr FMJ cycle reliably in short-barrel 300 Blackout builds?
The 300 Blackout cartridge was designed from the outset to function in AR-15 platforms across a wide range of barrel lengths, and supersonic 125 gr loads like this one are among the most forgiving configurations for cycling. At 125 grains and supersonic velocity, gas pressure at the port is generally sufficient to operate standard carbine and pistol-length gas systems. That said, individual rifles vary — particularly suppressed builds or those with adjustable gas blocks set for subsonic loads. Shooters transitioning between supersonic and subsonic ammunition in the same rifle should verify their gas system settings accommodate both.
Is this load suitable for deer hunting?
No. FMJ (Full Metal Jacket) projectiles are designed to pass through a target with minimal expansion, which is exactly the opposite of what ethical and effective big-game hunting requires. Most U.S. states explicitly prohibit FMJ ammunition for deer hunting, and even where not prohibited, FMJ construction is likely to produce poor terminal performance on deer-sized animals. For hunting applications, Hornady Black with the SUB-X or V-MAX bullet, or comparable soft-point and expanding loads, are the appropriate choices in 300 Blackout.
How does this load compare to Hornady’s own Black line in 300 Blackout?
The Frontier and Black lines serve different purposes within Hornady’s catalog. Frontier is positioned as a high-volume training load emphasizing consistency and value, using a standard FMJ projectile. Hornady Black 300 Blackout loads use purpose-designed projectiles — including the V-MAX for varmint/close-range use and the SUB-X for subsonic suppressor configurations — with more attention to terminal ballistics. The Black line commands a higher price per round. For range training and function testing, Frontier is the practical choice; for field use, Black or comparable expanding loads are more appropriate.
Can I use this ammunition suppressed?
Yes, with an important clarification: at 125 grains and supersonic velocity, this load will still produce a supersonic crack downrange regardless of suppressor use. A suppressor reduces muzzle blast and report significantly but cannot eliminate the ballistic crack of a supersonic projectile breaking the sound barrier. Shooters seeking a genuinely quiet suppressed experience need a 220 gr subsonic load in 300 Blackout, not this one. This load is compatible with suppressor use mechanically, but it is not a subsonic or hearing-safe round even when suppressed.
Is the brass from Hornady Frontier worth reloading?
Hornady’s Frontier brass uses Boxer primers and is manufactured to consistent dimensional standards, making it suitable for reloading. The brass case is the primary cost driver in centerfire ammunition, and recovering and reloading Frontier brass is a common practice among volume 300 Blackout shooters. Users report consistent case wall thickness and reliable primer pocket integrity through multiple firings, though — as with all brass — case life will depend on chamber dimensions, load pressure, and how aggressively the brass is resized. Note: AmmoReports covers factory ammunition only; this observation is provided as context for brass value, not as reloading guidance.
