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.300 Win Mag 175gr HP BT Subsonic
Price range: $227.50 through $1,820.00 — or from Price range: $204.75 through $1,638.00 / month
Atomic Ammunition .300 Win Mag 175gr HP BT subsonic ammo harnesses the magnum case capacity for maximum subsonic energy in a suppressor-optimized long-range platform.
Caliber.300 Win Mag
Bullet Weight175gr
Bullet TypeHollow Point, Boat Tail
Muzzle Velocity1,050 fps
Muzzle Energy428 ft-lbs
Sound Reduction35-45 dB w/ Suppressor
ApplicationSuppressed Hunting, Tactical Training, Quiet Shooting
Case MaterialBrass
American-made, bulk available
Ammunition orders typically ship within 7-10 business days of purchase.
Atomic Ammunition's .300 Win Mag 175gr subsonic ammo brings suppressed training and quiet hunting to magnum rifles without changing platforms. The 175gr hollow point boat tail load keeps noise and recoil down while preserving the accuracy advantages that make the .300 Win Mag so versatile.
Subsonic Performance & Applications
The .300 Win Mag's oversized case capacity provides a unique advantage in subsonic loading: more consistent powder burn characteristics at low velocities and the flexibility to run both subsonic and full-power supersonic loads through the same rifle. At 1,050 fps with a suppressor, the .300 Win Mag becomes dramatically quiet – 35-45 dB of noise reduction brings it below hearing-damage thresholds. The 175gr HP BT delivers match-grade accuracy at subsonic velocities, and the 428 ft-lbs of energy is effective for close-range hunting applications where stealth is critical.
American-Made Components & Quality
Every cartridge is loaded with American-made components: new brass cases, precision-weighed Hodgdon powder charges, and match-grade 175gr HP BT projectiles. Hand-inspected for performance consistency. Atomic Ammunition – 100% American-made.
Frequently Asked Questions
Will this cycle my semi-auto .300 Win Mag?
Subsonic magnum loads are designed for bolt-action rifles. Semi-auto cycling is not guaranteed at subsonic velocities.
Can I use the same rifle for supersonic and subsonic?
Yes. Simply switch ammunition and re-zero. No barrel or action changes needed. This is one of the key advantages of subsonic .300 Win Mag.
How does the energy compare to .308 subsonic?
Both the .300 Win Mag and .308 Win deliver approximately 428 ft-lbs at subsonic velocities with a 175gr bullet. The magnum’s advantage is in supersonic versatility, not subsonic energy.
Is the brass reloadable?
Yes. New boxer-primed brass, fully reloadable.
What is the minimum order?
Minimum order is 100 rounds. Bulk discounts on 200+ rounds.
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Count | 100, 200, 500, 1000 |
| Platform | Rifle |
| Caliber | .300 Win Mag |
| Bullet Weight | 175gr |
| Bullet Type | Boat Tail, Hollow Point |
| Muzzle Velocity | 1,050 fps |
| Muzzle Energy | 428 ft-lbs |
| Sound Reduction | 35-45 dB w/ Suppressor |
| Application | Quiet Shooting, Suppressed Hunting, Tactical Training |
| Case Material | Brass |
| Subsonic | Yes |
| Origin | America |
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