Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
When you chamber 300 AAC Blackout ammo in a platform built for versatility, you need a load that performs across contexts — from zeroing optics to defensive drills. Hornady’s American Gunner line delivers exactly that: a 125-grain jacketed hollow point pushed to 2175 feet per second, generating 1313 foot-pounds of muzzle energy. 300 AAC Blackout (7.62x35mm) is a centerfire cartridge designed to run in AR-15 pattern rifles with a barrel swap and compatible bolt, offering shooters the ability to fire both supersonic and subsonic loads from the same magazine. This American Gunner load sits firmly in the supersonic category — you get flat trajectory inside 200 yards and expansion characteristics suited to medium game and defensive use.
Load Profile
Hornady engineers each American Gunner recipe around propellant burn rates matched to bullet weight and intended velocity. The 125-grain JHP in this box runs boxer-primed brass cases — non-corrosive, reloadable — with powder charges balanced for consistency across temperature ranges. Jacketed hollow point construction means the bullet retains structural integrity during feeding while offering controlled expansion on soft targets. You’re not buying boutique match ammo here; you’re buying tested recipes from a manufacturer with generations of ballistics data behind every lot number.
Specs at a Glance
| Spec | Value |
|---|---|
| Cartridge | 300 AAC Blackout (7.62x35mm) |
| Bullet weight | 125 Grains |
| Bullet type | Jacketed Hollow Point |
| Muzzle velocity | 2175 Feet Per Second |
| Muzzle energy | 1313 Foot Pounds |
| Rounds/box | 50 Round |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Intended use | Range & Target |
| Manufacturer | Hornady |
Supersonic velocity keeps bullet drop predictable and energy delivery consistent at typical engagement ranges for 300 Blackout ammo platforms. Reloadable brass extends the cost-per-round equation for shooters who process their own cases.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Follow the four universal rules of firearm safety on every range trip.
- Verify your state and local laws regarding ammunition purchase, possession, and transport before ordering.
- This product contains lead, a chemical known to the State of California to cause cancer and reproductive harm. Use proper ventilation when shooting indoors and wash hands after handling ammunition.
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