Hornady Subsonic Ammunition designed for accuracy and performance below the speed of sound. Hornady Subsonic Ammunition doesn't have the loud report of a supersonic round and when paired with a suppressor it's even quieter. Unique powders optimized for subsonic use result in a low flash signature ideal for either suppressed or unsuppressed performance. This model is a 410 gr 45-70 Government caliber and includes 20 rounds per box.