Freedom Munitions HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammo 50 Rounds. Specifications for Freedom Munitions HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammunition: Manufacturer: Freedom Munitions Caliber: .300 AAC Blackout Number of Rounds: 50 Bullet Type: Boat Tail Hollow Point (BTHP) Bullet Weight: 220 grain Cartridge Case Material: Brass Application: General Package Contents: Freedom Munitions HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammunition What is Freedom Munitions HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammunition good for? The manufacturer says that it is suitable for general.Freedom Munitions FMH300H220N50: HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammo 50 Rounds