H&N Slug HP II Air Gun Pellets differ significantly from the usual pellets due to its bullet shape. It's designed for powerful rifles which can shoot such projectiles precisely at targets at 50, 100 or even 200 meters distance. An extremely favorable ballistic coefficient (BC) ensures a flat trajectory and excellent energy retention. The muzzle energy of the rifle should be at least 18.4 ft/lbs, but for best results it is recommended to have an air gun with a muzzle energy of 29.5 to 44.2 ft/lbs. All pellets get visually inspected, hand packed and secured for transport with foam pads.