Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Atomic Match Subsonic 308 Winchester ammo bridges the gap between precision rifle performance and suppressed shooting. Loaded with a 175-grain jacketed hollow point at 1,050 feet per second, this round stays below the sound barrier under standard atmospheric conditions, eliminating the supersonic crack that defeats the purpose of a suppressor. A subsonic load is one that does not exceed 1,100 fps, ensuring the projectile never breaks Mach 1 during flight. Atomic Ammunition manufactures all rounds on commercial-grade machinery to match-grade specifications, with each cartridge inspected individually before boxing.
Load Profile
The 175-grain jacketed hollow point delivers 428 foot-pounds of muzzle energy with a G1 ballistic coefficient of 0.505 and sectional density of 0.264. Brass cases carry Boxer primers, are non-corrosive, and remain fully reloadable. Atomic built this load for bolt-action precision rifles and single-shot platforms — it is not specifically designed to cycle semi-automatic or fully automatic actions. Shooters running subsonic 308 ammo in gas guns should verify reliable function with their specific rifle and buffer configuration before committing to a bulk purchase.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 308 Winchester |
| Bullet weight | 175 grains |
| Bullet type | Jacketed Hollow Point |
| Muzzle velocity | 1,050 fps |
| Muzzle energy | 428 ft-lbs |
| G1 ballistic coefficient | 0.505 |
| Sectional density | 0.264 |
| Rounds per box | 100 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Intended use | Range & Target |
| Manufacturer | Atomic Ammunition |
Atomic sources components domestically and manufactures in the United States. Each lot undergoes independent laboratory validation to confirm ballistic performance and pressure safety margins meet SAAMI specifications.
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.
- Treat every firearm as if it is loaded. Keep the muzzle pointed in a safe direction at all times.
- Be certain of your target and what lies beyond it. Bullets can travel for miles.
- This product contains lead. Wash hands thoroughly after handling. California residents see Prop 65 warning.
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