Home » 308 / 7.62 mm » 300 Blackout » Hornady Frontier 300 Blackout 125 Grain FMJ – 20-Round Box

Hornady Frontier 300 Blackout 125 Grain FMJ – 20-Round Box

0

Ammo Reports Team 8 300 Blackout

SaveSavedRemoved 0

Data is based on official manufacturer sources. Found an error? Send us the source link.

Manufacturer: Hornady. Exact official product pages and technical documents are recorded in the editorial verification log. Any retailer-listed field is labeled.

Ballistics Table

Official-data note: Hornady publishes this table from a 16-inch test barrel with a 200-yard zero. Wind drift is not shown.

Key takeaway: Item FR400 is the 20-round configuration. Hornady lists 2175 fps and 1313 ft-lbs at the muzzle.

Related 300 Blackout factory loads on Ammo Reports: Federal American Eagle 150 Gr FMJ, Hornady Custom 110 Grain CX, and Hornady Subsonic 190 Gr Sub-X.

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 cases and a non-steel-core bullet are preferred
• 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 where a controlled-expansion bullet is required; verify the applicable regulations before use
• 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 that the Frontier line uses military-grade Boxer primers. This review does not infer unlisted primer seating, charge, or case-dimension tolerances from that description.
• Hornady specifies brass cases, but reloadable status was not found in the verified official material for this SKU.
• 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

This is the full comparison set preserved from the article’s existing competitor list. A link is added only when an exact Published review exists on Ammo Reports. Unverified competitor fields are labeled accordingly.

Price Reality

Retail prices and availability change. Compare the current store listings below and verify SKU FR400 and the exact 20-round package before purchase. Price is not used to determine the technical data or editorial conclusion.

Where to Buy

Affiliate links. These do not influence ratings, data, or any editorial content on this page.

FAQ