Home / Centerfire Rifle Rounds / Atomic Ammunition / Atomic Ammunition Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds CART-300WIN-175-SUB-20
Atomic Ammunition Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds CART-300WIN-175-SUB-20
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Sep 2, 2026
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Atomic Ammunition Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds CART-300WIN-175-SUB-20. 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. The .300 Win Mags 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 1050 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. Every cartridge is loaded with new brass cases precision-weighed Hodgdon powder charges and match-grade 175gr HP BT projectiles. Hand-inspected for performance consistency. Specifications for Atomic Ammunition Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition: Manufacturer: Atomic Ammunition Caliber: .300 Winchester Magnum Bullet Type: Boat Tail Hollow Point (BTHP) Bullet Weight: 175 grain Cartridge Case Material: Brass Muzzle Velocity: 1050 ft/s Muzzle Energy: 428 ft-lbs Application: Hunting Package Contents: Atomic Ammunition Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition What is Atomic Ammunition Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition good for? The manufacturer says that it is good for hunting.Atomic Ammunition CART-300WIN-175-SUB-20: Subsonic .300 Winchester Magnum 175 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds
