Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For suppressed AR-15s and bolt guns chambered in 300 AAC Blackout, the Norma 220 grain Full Metal Jacket subsonic round sits in the sweet spot between training economy and terminal reliability. At 942 feet per second, this load stays below the speed of sound, eliminating the supersonic crack that defeats the purpose of a can. Norma — a Swedish marque with over a century of ballistics R&D — produces this ammunition in the United States, applying the same lot-consistency standards that have kept their match and hunting lines on competitive and professional rosters worldwide. The 300 Blackout cartridge (7.62x35mm) was purpose-built for short-barreled rifles and suppressed applications; the 220 grain FMJ configuration maximizes subsonic dwell time while maintaining reliable cycling in gas-impingement and piston systems alike.
Performance at a Glance
The 220 grain projectile, copper-jacketed over a lead core, exits the muzzle at 942 fps and delivers 433 foot-pounds of energy. Norma loads each round in new-production brass with a boxer primer — non-corrosive, reloadable, and dimensionally consistent across the lot. The full metal jacket profile feeds reliably through semi-automatic magazines, and the subsonic velocity envelope keeps noise signature low when paired with a suppressor rated for .30-caliber bore diameter. Whether you’re breaking in a new can, running drills on steel at 100 yards, or conducting function checks after a trigger or gas-block swap, this ammunition provides the consistency required to isolate mechanical variables from ammunition variables.
| Spec | Value |
|---|---|
| Caliber | 300 AAC Blackout (7.62x35mm) |
| Bullet weight | 220 Grains |
| Bullet type | Full Metal Jacket |
| Muzzle velocity | 942 Feet Per Second |
| Muzzle energy | 433 Foot Pounds |
| Rounds/box | 20 Round |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Velocity Rating | Subsonic |
| Intended use | Range & Target |
| Manufacturer | Norma |
This ammunition ships in 20-round boxes, making it economical to stock for practice sessions and suppressor testing without committing to bulk quantities before you’ve confirmed reliable function in your specific rifle. Browse the full 300 Blackout ammo inventory to compare supersonic and subsonic loads by grain weight and bullet profile.
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.
- Observe the four universal firearm safety rules: treat every firearm as loaded, keep your finger off the trigger until ready to fire, never point at anything you’re not willing to destroy, and be certain of your target and what lies beyond it.
- Verify that your barrel, chamber, and suppressor (if installed) are rated for .30-caliber 300 Blackout; do not chamber 300 Blackout in 5.56mm/.223 Remington barrels.
- This product contains lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Use adequate ventilation, wash hands after handling, and consult www.P65Warnings.ca.gov for additional information.
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