Sierra .22 Cal .224 77 grain hollow point boat tail (HPBT) bullets with cannelure are designed for precision performance. This MatchKing series product includes 50 rounds per box. These bullets are optimized for use in barrels with a twist rate between 1 in 7 and 1 in 8.Key FeaturesBullet Type: Hollow Point Boat Tail MatchKing with cannelure.Weight: Each bullet weighs 77 grains.Quantity: Each box contains 50 bullets.Ballistic Coefficient: .372 at 3000 fps and above, .362 between 2500 and 3000 fps, .362 between 1700 and 2500 fps, .343 at 1700 fps and below.