Subsonic Varmint Ammo Features One look is all it takes to know that CCI understands what varmint hunters desire. The Varmint Ammunition line features a variety of bullet technologies that are designed for the same goal: total devastation on impact. Subsonic Varmint Ammo Specifications Brand: CCI Category: Rimfire Rounds Caliber: 22 LR Model: Varmint Bullet Weight: 40 gr Rounds Per Box: 50 Casing Material: Brass Boxes Per Case: 100 Bullet Type: Segmented Hollow Point Muzzle Energy: 98 ft-lbs Muzzle Velocity: 1050 fps