Atomic Rifle Ammunition Features The Atomic Ammunition .308 Win load is built around a 175 grain hollow point boat tail bullet a heavy for caliber projectile chosen to maintain stability and energy at subsonic velocities. Loaded to a muzzle velocity around 1050 fps this round stays below the speed of sound eliminating the sonic crack that accompanies supersonic ammunition when fired through a suppressor. That subsonic profile makes it a natural pairing for suppressed .308 rifles used in hunting training or recreational shooting where reduced signature matters. The boat tail design helps the bullet retain velocity and accuracy over distance despite its reduced speed. Brass cased construction allows shooters who reload to recover and reuse the cases adding value beyond a single range trip. Each box contains 20 rounds a manageable quantity for pairing with a suppressor demo a quiet hunting outing or a dedicated practice session. The combination of a heavy bullet and subsonic loading reflects a purpose built design rather than a repurposed supersonic load. Atomic Ammunition .308 Win 175 grain HPBT is a focused subsonic option for sale at GrabAGun for suppressed rifle shooters. Atomic Rifle Ammunition Specifications Manufacturer: Atomic Caliber: .308 Win Bullet Weight: 175 gr Bullet Type: Hollow Point Boat Tail Muzzle Velocity: 1050 fps Casing Material: Brass Rounds Per Box: 20 Available At: GrabAGun