This is .223 Ted Nugent 55gr. Barnes TSX Hollow Point Ammo. Developed for hunters that demand the most out of each round they shoot. Ted Nugent Hi-Performance Ammunition has unparalleled stopping power and accuracy. Teaming up with Barnes Bullets, Uncle Ted’s Ammo line uses Triple-Shock X (TSX). TSX bullets are renowned for their deadly accuracy, immediate expansion, and game stopping performance. Muzzle velocity of 3056fps. This ammo is brass cased, boxer primed, non-magnetic and non-corrosive. This ammo comes packed 20rds. per box.