The Atomic Ammunition 00478 Rifle Subsonic 300 Blackout 260 Grain Round Nose Soft Point Boat Tail is purpose built for shooters who want quiet, consistent performance from their .300 AAC Blackout rifles. Loaded with a heavy 260 grain MatchKing style round nose soft point boat tail bullet and carefully selected components, this subsonic load is engineered to stay below the speed of sound while still delivering dependable energy on target and excellent accuracy.

This cartridge is ideal for use with sound-suppressed rifles or any setup where reduced noise and recoil are priorities. With a muzzle velocity of 1050 fps and muzzle energy around 637 ft lbs, it performs well on medium game and for training or range work where comfort and control matter. Each round is assembled in brass cases that are reloadable, reflecting Atomic’s focus on quality and value.

• Manufacturer: Atomic
• Model: 00478 Rifle Subsonic
• Caliber: .300 AAC Blackout
• Ammo Bullet Type: Round Nose Soft Point Boat Tail MatchKing
• Ammo Bullet Weight: 260 grain
• Ammo Round Count: 20 cartridges per box
• Muzzle Velocity: 1050 fps